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General Security when Traveling
Many of you will need to travel for work or for a vacation. Some travel within your own country, others will be outside your country. With the changes to borders by various countries, you now need to be more vigilant on what you keep with you that may get searched or used against you.
Short of leaving all your electronic devices home or having a security detail watch you everywhere you go, there are steps you can do to protect your privacy from snooping and some actions to keep your persons safe as well. This is not an end all fix all, a change in legislation and ideology is the only way to fix that.
Some of these suggestions may help, some may not. Governmental polices and feelings are to in flux so there is no hard and fast solution. With that being said, I am not responsible if the options do not work for you. These are guideline and general options:
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Yourself and ones close to you
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Try to fit in to the environment you find yourself in, be like the locals, dress like the locals. Some countries have expected dress codes for different genders, some do not. Spend some time getting to know it and what the history of the location is.
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Set up meeting places if you get separated from your group. People are going want to explore if they have never been to the location before. That is good, it helps you grow. Some of that exploring may get you separated from others or if there is a major event and chaos becomes the norm, you will need places to find others that may have gotten swept up in the event. Have multiple places, not a lot maybe two or three. Depending on the event some location may be better than others. Some location may be the center of the event other may just be passed by like they do not exist. The do not exist places are the safest, again it will depend on the event, so having a few, and everyone knowing about them will be helpful. They can be most anything, statues, gas stations, hotels, churches, a locally known person’s house. But remember they can also be the worst places to be, so just note the event and chose carefully.
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Make note of the location you are staying at. If it is a hotel note the escape areas, stairs and elevators. Note the area around the hotel and the buildings near it, can you jump to the next building if needed or can you climb out the window using bed sheets? Are you able to get to a location or can you defend in place if needed? Noted from one of my executive protections professors, set up zones of protection around yourself. Things you can drop if needed and things you need to keep close. Note things you may be able to barter with, like jewelry or even shoes. If you worried about losing mom’s priceless ring heirloom then leave it at home, you don’t need to show it off that badly. In fact leave most of your jewelry at home, maybe take knock off stuff but keep the good stuff at home. Keeping things like medicine, passports, money, things you need to have at all time, place them in something that you can grab quickly and go.
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Learn the history of the place, when I talk of history I do not mean ancient history, I mean recent history. Has the location had any large scale events, such as earthquakes, upheavals in governments, civil unrest, things on that type. Have some knowledge of the location where you will be staying, its main roads, airports, travel places.
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Have a quick escape plan, if you need to leave how will you do it and where will you go? Make sure everyone knows it and knows what to do.
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Electronic devices
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Next to yourself and family many people will feel that their electronic devices are like a second child to them. I am talking about their cell phone, tablet or laptop. These devices hold more data about you than most of the paperwork you may have in your lock-boxes. Personal contacts, social media, account numbers, search histories, all this information can create a profile about yourself that is very accurate and can be used to cause harm or simple embarrassment if not kept secure. It’s called “Metadata” It alone can create a very accurate profile on you, your likes, habit’s and how you live. It can show links to people that you may not care about but may flag you because of someone else may be a person of interest to others, so you now become a person of interest. Guilt by association. In the past this was not really an issue, but in this day and age its more and more relevant. With the new policies in the US and its boarders, searching of your laptop and phone’s contents has become more widespread. Even to the point of forcing you to login any social media so it can be copied for later viewing. Removing you phone from your sight and copying all its contents is another now normal at boarders. Sure you can resist, but you will be tired, hungry, and you are stuck in an environment that others control. Its easier to just give in and let them win. If you do some preparing beforehand you can minimize some of the loss of privacy, not all but you will be more in control of the data they will have access to.
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For your cell phone if you can use a burner phone, then buy and use it. Its safer for you because if its stolen or border control want to look at it, there is not much of your private data that can be tracked, then your just out that phone and the hours you put on it, not your main phone. If you have to take your personal smart phone then make sure it is encrypted. Many new phones have options to encrypt it when it is turned off. It is still possible the border people will want you to turn it on but its something. Another step is to remove all your social media apps from the phone. Twitter, Facebook, snapchat, dropbox, etc. Log out and clear your cache from the phone. Look into apps that will have encrypted sections you can store data in if you need to have the data. I know smartphones have wonderful cameras so you will have photos of your trip, if you can keep them in secure storage all the better. Have a few G rated images on the phone to make it look like you do use it so less change of sticking out in a search.
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For your laptop, that is a tough one. My recommendation is not to take it at all. But if you really feel you need one with you, then use one like a chrome laptop. Having no OS for them to search and using the web only so your information is reasonably secure. Have two accounts, one main, and one you use to auto boot it up to have them look at if forced. If you feel you need to have it then have hard-drive boot encryption and encrypted folders. This will keep your mind at ease if it gets it stolen or lost but not as much of told to boot it up so they can make a copy of the hard-drive. Another option is to have it shipped to the place you are going, not one I recommend easily for small person business but larger corporation may have that option. Some smart phones have encrypted micro SD cards, you can store needed data on them and insert it when at your location. When using your laptop have it run a VPN that you setup before you leave on the travel. If that is not possible then use TOR or some other type of anonymous web serving solution. One never knows who may be sniffing the traffic at the location or in-between you and your location. I should not need to remind you not to do banking or accessing sites of a private personal nature when traveling, if you do then you get what’s coming to you.
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General
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Be helpful but not overly so. If not asked, don’t give information. You need to keep remembering they do not work for your protection, they work for the government’s protections.
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Use a VPN at all times if you are browsing and non-home network connection. If not able to install a VPN, then use TOR to keep some of your searching anonymous. When you order a VPN make note of their log policy, find one that does not log anything, and look for ones that have multiple countries you can connect to. Watch out for VPN fakes, they will sell you a fake do nothing VPN’s, so do research on ratings.
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If they take your devices out of your sight, then I would treat them as a bio-hazard and never use or turn them on again. If they leave your sight, then you never truly know if any spyware apps have been installed on the device. Safe now or sorry later, up to you.
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Don’t stay quiet if any of this happens to you or someone you know, write a letter to your congressmen, complain to the company, use other services, Ask why you are being singled out for the exposure, make a scene so other see the stupidity of what is going on. Don’t just sit back and let it happen. Seek legal action and let them know about it. Contact organizations like the EFF and Civil liabilities groups.
Welcome to 2017 new and the old
Now the new year is rolling around there are some things you should revisit or even do if you have new toys.
Let’s start with the old stuff that you should revisit.
First you should go through your accounts, yes all of them, and see what can be removed. Like many of us we at the time think we need an account but find out that we never or hardly use it so remove it. Of course before you remove it note what places use it or send stuff to it. Would be bad to remove an account thinking it was UN-needed account and find your key tax or stock information gets sent to it, not good. If not sure then note the account and watch it from time to time as things are sent to it then go to the sending account and change it. If it’s an email account and not sure, then make it in-box-zero. That means clear it out so no mail is there, it has some advantages. First it will make you feel good that you now have a place that is clutter free. It will also make it harder for companies to make a portfolio/file on your likes and connections and make it easier to see what you get that is needed and what you get that is junk. I also want to say that there are E-mail and IM services that encrypt send and receiving of messages, thats the time and look at them.
Next in the list of revisit is to change the account password or your important sites and systems if not done in the last few months. There are many ways to define passwords from letter number combination to first letter of a saying you like. The key point is to not reuse it on other accounts that you have. Use a password manager there are many around from Lastpass, Mypass, even use an encrypted document with the password (with this one do not put it on a cloud service) to store so you can use different ones. This works with e-mail, banking, etc. Also the security questions that many are asking you when first created you do not need to tell the truth, in fact lie and make up an answer for them, just remember to document it so you will be able to retrieve it when asked.
Since we are going into the list, now is a good time to look in the scraps of papers that have account and password and put them in the file as well so you will have quick access to them. Put them in a few different places and different formats like paper in the safe as well as electronic HDD and thumb-drives. Do make sure if in electronic format it is encrypted in some way and another person knows the password if something happens to you. All forbid you die and your accounts are locked away in your dead brain never again accessible by your loved or hated ones.
Now let’s hit on the new toys and stuff you got.
If you’re lucky or perhaps unlucky you got some gadgets for the holidays that need to be set up and connected to other electron things that you have. Crack out the electronic document, paper and pencil or pad and pencil to start a document folder on them. Yes you may say why do I need to document the new cheap gadget I just got? Trust me, it will make your life easier in nine months or so when it needed to be reset and you no longer remember what you did to set it up the first time, yes a pain, but worth it.
Many new gadgets like web-cams, routers, TV, refrigerator, IoT (Internet of Things) devices have a default passwords and account on them, CHANGE IT, CHANGE IT. If you can’t change the account or password then “DO NOT USE IT” send it back and get your money back. Sure, the devices may be cheap but the manufactures still need to think about security. The best way for them to see it is with your pocketbook, don’t use them, or get a better model that allows it to be changed. Devices called IoT or Internet of things are quickly becoming the attack vector of choice for bad-people. From DDOS (Distributive Denial of Service) to use of it to spy on you and your kids. The devices are a treasure trove for them. Don’t make it any easier for them and don’t become a part of the IoT bot-nets that are used to create large traffic bottlenecks to places and slow down the Internet for us all. Taking the time now will benefit all of us later. When creating a password use the longest it will allow, most likely you will only change it once, so make it a very long and complex one. If it allows you to change the account name then make it something not recognized as a device. Before you open it up to the network explore the document and the device itself, know how it is supposed to work so you will be able to recognize when it is not or has been attacked. With the IoT devices some things to look for: If there is a remote management access via outside of your network then “Turn it off” if possible. Think if it this way, why do you need to tweak with the device from an Internet Cafe after its been set up? Setting up the device local first to what you want. If from time to time you find an issue then connect and adjust when you are at home. A pain maybe, but security is the bottom line for all IoT devices. Never just plug it in and think it’s done, because then someone else will control it, not you.
Make sure you are all patched up on your devices, from phone to computer to doorbell. Many devices allow for updates and patches to fix problems. If you don’t know how to update it and do not want to know maybe the device is not for you, better yet learn how to update it. Get help if you need it, much of what you need to know is freely available if you just take a little time and look for it. Yes at times things will change, programmers love tweaking to make it “better”, but in the long run it will fix security issues for the benefit of all.
Some final thoughts for the new year : First off, security is hard, it is what it is, it takes time and effort to get it right, this is not to say the effort is not worth it, it is. You will be rewarded if you take the time and walk through the steps to make it very difficult for others, I am speaking of people that want to steal your information to get the data. If a group or people with enough resources let’s say a state or nation want to get your data or attack your system they will and you will lose, sorry but they have more funds then you. You by taking the time, can make it harder for them to do so. Next keep in mind if something is free then it is you that are the product that they are selling, yes Google, Facebook, Yahoo, and the others may give you “free stuff” but there is a reason the owners and value of the business is worth what it is, you are the product being sold. Also note you do not have to give them correct information or at times information at all, lying works quite well. Some services will not work and if you like them then by all means use them, but remember there is a cost. With that thinking also ask yourself, do I really need to use the service? The answer may surprise you and contradict what you hear by the business pressing the service on you. Don’t always take what is being given as truth, question it, question the reason for it, look to other options. You can say no to it. This works with your security and life in general. Have a Happy New Year!
What future do we want..
This posting will be a bit different this time. I am just going to discuss general security thoughts and feelings about what is going on in the world.
The most pressing is the expansion of spying this government is doing on you and me.
Many have read about the NSA capturing much of the data that is being exchanged on the internet. A lot has been discussed about the legal and moral rights to do so. You will have heard the expression “if you have nothing to hide then is should not matter”, I put foreword that “why are you spying on me if I have nothing to hide?” I also question the reason the number of acts that were prevented are classified. I believe the reason they are classified is because it does not work and if brought to the light of day we would demand the wastefulness of it stopped
How much of this spying effects the society as a whole? If you know you are being watched it has been show that you will change your behavior, and sadly not for the better. Many of us will not express ourselves as openly as we should for a free society to work.
As part of human nature is we give up freedoms when we are afraid, think of 911 and what was taken from you. Its not weakness on your part but it is just the way we are, not good not bad it just is.
Many say well its been allowed by law, but is it really? There are unjust laws, created by people wanting to keep the status the way it is for them and you. In our long history there have been laws created to control you by others, never forget that. Must we always follow a law because it is a law? I say no, we must follow the Constitution and its fundamental principles, and one of the principles is liberty. Having what you say and to who, stored and sorted for reasons that are hidden from you is not the actions of a free society but the actions of a broken society. Would the creators of this country have agreed or would they as well be labeled malcontent’s and disruptive by this very same government? I bet they would be. So give a voice to your questions and ask them, not by email but by true letter or phone call to your congressional representative. Let them know that what they are doing is not what a free and open society does if it wants to stay that way. Lets take back our government so it is again a free and open country by and for the people. Don’t know who your representative is? Find it here: http://www.house.gov/representatives/find/
What can you do?
You may say that security is hard to do, yes it is, but with some effort most everyone can exchange information privately. There is a framework called the internet that can help, search and ask and you will be rewarded many time over for the better. There are E-mail tools, IM tools, Chat tools, and web tools that can help keep what you say private. Many of the tools work on most of the devices you use, from phone to computer and are quite easy to install and setup. Stay informed on what is being done with and to your data. If there is a question then look for the answer and if the given answer seems incorrect then look deeper.
Just need to remember, its like anything we as humans create, it can be used for good or evil, its up to us to decide how we use it.
Setup and sending encrypted e-mail.
With the changes in many of the laws that kept the government out of your information, they have more access now than anytime in the country’s past. If you don’t mind the intrusion access then that’s fine, but if you do read on.
This entry will cover setting up and sending your encrypted mail to another using Thunderbird, EnigMail plugin and PGP /GnuPG programs. I am using Thunderbird because it is available for most every operating system around and its free, but I would ask you give a donation to help keep it around.
If your already using Thunderbird mail client then you are half way finished, if not you will need to install the client for your OS to use first and get in working correctly. Go to www.mozilla.org/thunderbird/ and download the version for your system, then setup your account. You will need to install enigma mail plugin and GnuPG. To get EnigMail plugin go to http://enigmail.mozdev.org/home/index.php.html and select the version for the OS you are using. If you are using a newer version of Thunderbird you can go to the “Add-ons” sections and search for then install from there, simple and easy or you just download the version and select Install from the “Tools -> Add-ons” menu, Select the .XPI file and install. Go to www.gnupg.org to get a copy of the program and install using the instruction for your OS system.
Now that you have a general idea on what, why and how of encryption, lets get started using it to send mail to another person. Install the Thunderbird plugin and install GNUpg program as well on your system. The first thing you will need to do in set up a public/private key. The Private or (secret key) is for you, the public key is for everyone else. There are two ways to generate the keys. One way is to use the command line, the other is to use the GUI in the Thunderbird OpenPGP option, for now will show the OpenPGP option.
Start Thunderbird then select OpenPGP, from the drop down menu select “Key Management”. Select “Generate” then “New key pair”. Select the Account / User ID you want to use then give it a paraphrase, you may also want to give it a comment, that is up to you. You can leave the Key expires option alone for this time, you can play around with others after setup. Select the Advance tab, depending on the speed of your machine you can leave the settings for Key size and Key type alone. Increasing the size will increase the time it takes to generate the keys, if you want to make it very difficult for people to hack your keys use the 4096 and DSA & EL Gamal option, it will take a while to create the keys so be aware of that. The 2048 key size is quite large and difficult to crack so you can leave the Key size and key type alone. After you are happy with the settings select Generate Key, sit back and wait for a bit while it generates the keys for you. When the keys have been generated they will show up in the Key management box.
Now lets get to using the generated keys. First you need to send them to another person, to do that select Key Management again, you have three options. One option is to send the public key by email, another options is to send the Public Key as a file and the last is to upload the Public Key to a key sever. For now just use Send Public Key by Email option, select the email of the person or persons and send. In the attachment sections you will see the public key, it will be numbers and letter with an .ase extension. When the person gets the email they will save the attachment into there PGP key folder and from then on they can send messages to you encrypted.
Sending encrypted E-mail is quite easy from then on. Select Write then enter the email address, from the OpenPGP menu select Encrypt Message, enter your Subject and message then click Send, you may be asked to verify the recipient public key then it will send the message. When the message is received open the OpenPGP pull down and select Decrypt/Verify, it will ask for the password to your private key and then will decrypt the message. And the good part is it is only decrypted when you want to see it, all the others times is encrypted.
Its sad you have to do this to protect your self from unreasonable intrusion by the government and business but..$fdRuyde^%7gde43%ynb(4sCX234gmq093467v%$dffg4^&=asw
Secure between you and others – Encryption
Picture a world where complete strangers know the personal information you send to your family, everything you send to someone else, is copied and viewed to make sure you are not a threat to the society. This sadly is what seems to be happening more and more lately, but if you are diligent there are things you can do to keep your information private.
With his group of entries I will explain how to use encryption of email between you and another person to keep the information out of prying eyes. The idea is simple, being able to send and receive mail between you and another knowing that even if the traffic is sniffed and the data is captured it will be secure for a while, I say this because as technology evolves it will at some point be able to DE-crypt the message, but most likely far in the distant future long after you and most of the human race is gone. The idea is to keep the length of time long enough so it does not matter if they do DE-crypt it because the information will no longer be useful. I will discuss using Thunderbird, GnUPG (PGP) and enigma mail plugin as my E-mail and encryption programs. There are others that will be added as time goes on. This set of entry’s will cover securing your E-mails from others, they being your ISP’s, data miners and even your own Government. We could talk all day about the idea that if your not doing anything you have nothing to hide, but will just leave it as the only ones that need to read it is you and the person you are sending it to, no one else.
What is Public key Encryption –
Why think about encryption? If you have nothing to hide then you don’t need to use it, do you? Just some of the questions that people put forth when you say you want to encrypt stuff between you and the other person only. Security is a right not a privilege, what is exchanged between you and the person should only be known between you and the person. There are many ways to encrypt messages, the one I will describe is called public key encryption.
The idea is that Bob and Alice want to exchange messages and do not want John to be able to see them. The problem is that the only method is a media that can be sniffed that is the traffic can be viewed. Think of the postal carrier: you put the mail in the mail box and the letter going into a public system that can be looked at if one wishes. To prevent that public, key cryptology was created. The way to think about it is that each of you have two types of mathematically defined keys. Both of the keys are created at the same time. One key you keep and one your give away, that may sound strange but here is why. You use the public key to encrypt and only encrypt the message, by knowing the public key you can not decrypt the message. When you get the encrypted message you use your private key and only your private key to decrypt it. The private key can be used to know it is you and only you that will read the message. Each private and public key are a matched set and if they are tampered with they will no longer work together. (the deep workings are at this time a bit beyond the scope of this but maybe I will do a special posting explaining it deeper)
Now back to Bob and Alice’s message exchange problem, Bob wants to send Alice a message that only Alice will be able to read, One way this could be done is to have both of them use the same password to encrypt the message, the problem is how do you exchange the password if they never are able to see meet each other directly. This is were the public key comes in, this is a lock that can be publicly given out that can be used to encrypt a message by anyone. But only the recipient has the private key to decrypt the message. The first thing they do is create a combination of private and public key, this means that the public key can be used to lock the box but only the private or secret key can be used to unlock the box.. So after they both create there public/private keys they can do one of many ways to exchange the public keys. They can send them to a central key server that holds the keys so Bob can search for Alice’s public key, Alice can just send Bob the public key in E-mail, if they are really paranoid, Alice can send the key one letter at a time to Bob and he can convert it for use, long way but it does work. Lets say Bob get the key from Alice some way, Bob would then take the message and put it in the box and lock the box with Alice’s lock and send the box to Alice, this box is unbreakable when the lock is added. Alice upon getting the box would use her private key to unlock the box and view the message. Bob could put his private key into the box so Alice can verify the message was from Bob. Simple but you should now get the general idea, some questions could be how does Bob know the private key is from Alice and not John and vice versa.
Deeper reading of you like
www.gnupg.org
https://en.wikipedia.org/wiki/Pretty_Good_Privacy
http://www.openpgp.org/
http://www.pgpi.org/
http://www.pgpi.org/doc/pgpintro/
http://pgp.mit.edu/
http://philzimmermann.com/EN/findpgp/
Project – best practices for people to use to keep there data secure, including tools.
Greetings All —
For a while there have been questions from people on what are the best ways to keep your personal data and information safe from prying eyes on the net. This is is a hard question because your data is now a valuable commodity, by many groups, both business and governmental. Some of it is a good thing, much of the free services would never be around, or of it is it would be a “pay for use” type system if all of your personal data was kept hidden away and not able to be used. The internet we see now may never have grown to what it is today. So some personal information being used as a commodity is a good thing, but, you still need to protect as much as you can of it and how it is being used. For a few blog entries there will be some tips and ways to keep most of it secure, and ways to keep track of it from people that try to take and use it. It is not totally possible to keep all your data safe, never has and never will be, sorry that is the way it is.
For the next few entries I will give you some ideas to keep your data safe and also give you some tools to use to help as well. Here are some of the key points I will try to cover and not in any special order except I will do the general information first.
Key points to cover –
General information
E-mail
File exchange
Web browsing
IM exchange
Buying online
Social media
There are some things you can go right away, some take a bit of work but are worth doing to give you a fighting chance to keep your data safe. For now I will leave you with one quick idea, it is easy but it does require some work. It is passwords, make sure you change them from time to time, and don’t use the same one for everything. Each site should have its own password, Ok you may be saying “well how to I keep track of them all?.” There are programs that will store them and are password protected as well. When it comes to passwords, lengths is not always what matters it is what letters/numbers are being used for the password. A nice rule of thumb is 10 characters with a mix of numbers letters and special characters, that being ($&#*) or a mix of others depending on your keyboard. Use at least three of them and don’t use thinks like your pet, home, kids, or real object names. Many times people will use a dictionary to scan for the names. If you want to do a bit of looking check out Steve Gibsons web site (grc.com) he has a nice write up on password storage programs.
Well that should keep you bust for a while – more to follow.
Keeping your messages safe from prying eyes
With the current political environment your privacy is being chipped away more and more each day. Much of the debate is based on the idea that if you are not doing anything wrong then you should have no worry about your information being viewed by the government, this in itself is a fallacy. Another debate is that they need the ability to view everything to protect you from terrorists that are bent on harming your way of life, this is a long discussion in itself, but not here.
With the next few entries I will discuss ways to keep your messages private between you and the people you want to exchange information with. The key ones will be E-mail, IM and file exchange using encryption and encryption type programs. Some of them require usage of special programs that you and the person your are exchanging information with need to have set up. It is quite simple to do, I will also give some tips and tricks on using them. All of the applications I will talk about are open source so if you wish to view how they work you can.
The E-mail program I will be using in the discussion is Thunderbird with some plugins. It has clients for windows, mac and Linux, I use this because it seems to be on of the more extendable clients for email. It will be used with a public key / private key clients to encrypt and decrypt the messages. For exchanging IM between you and another person I will be expanding on pidgin, it is a multi-service client, that is it works with yahoo, AIM, jabber, exchange and some others. The last group of topics will be encrypting your files, so if you travel you can be generally sure your files will be safe from prying eyes. This is not the entire list of applications you could use, nor is there a guarantee that the data can not be decrypted at some time in the future. As technology changes one never knows, but for now its mostly safe.
I will add different programs as I go from time to time under the same heading, so I hope it will spur you into keeping an eye on your data and who may be snooping on it, for good or evil.
E-Mail Security Tips
E-mail security tips.
This posting I will define some E-mail security tips, as always it is not a full and all fix for security but a good list of tips.
If you use a browser to access your Email, one of the most important tips is to make sure it uses SSL to connect you to the mail server. SSL or Secure Socket Layer is a internet standard of connection that will encrypt the connection so no or very little information is visible about what is being send.
A way (but not all the ways known) is to look for the https:// in the browser path. Some will change part of the dialog box green. Google does this, Other E-mail systems do as well.
If it connects using HTTPS then falls back to HTTP, my advice is to use a different web based E-mail client. On that note when ever possible do not use public machines to Login to your E-mail. Firstly you have no idea the setup of the machine and what programs are running at he same time your are trying to log into your account. Many places will add logging programs to there systems. This is not as a desire to track you but some places must to protect them from you.
When setting up A Email client connection (the way I would recommend when possible), IMAP or POP, try to set the connection to SSL or TSL to begin with. You will need to look at your client closer to know were the settings are located. Or go a simple search using your search engine of choice.
I want to talk a little on email clients, there are many to choose from, some are cross platform others are single platform. Cross platform clients are nice because you only need to learn one way to do something and most have the same function for each of the operating system. Many have the same basic functions, most are free so give them a try.
The ideas discussed here will only get you security for the connection and the exchange from your machine to the email server. There still is a risk if the other receiver gets the message from a unsecured machine or connection. One way to reduce the risk is to encrypt the message on the mail server and in turn require the receiver un-encrypt any messages sent. The next posting will hope to cover ways to to have your messages kept secured on the mail server, your own client and the receivers system.
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