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Using a VPN is a terrific way to protect your internet traffic when you are traveling, but it's not a solution for encrypting your regional files. .

When the FBI needed information from the San Bernardino shooter's iPhone, they asked Apple to get a rear door to get past the encryption. But no such back door existed, and Apple refused to make one. The FBI needed to hire hackers to get into the phone.

Why wouldn't Apple help Because the moment a rear door or comparable hack is different, it will become a target, a prize for the poor guys. It'll leak sooner or later. In a discussion at Black Hat this past summer, Apple's Ivan Krstic disclosed that the company has done something similar in their cryptographic servers.

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Apple can't update them, but the bad guys can't get in either. .

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Each of the products in this roundup explicitly say they have no back door, and that's as it ought to be. It does mean that in the event you encrypt an essential document and then forget the encryption password, then you've lost it for good.

Back in the day, if you wanted to maintain a document key you could use a cipher to encrypt it and then burn the original. Or you might lock it up in a protected. The two main approaches in encryption utilities parallel with those options.

One type of product simply processes files and folders, turning them into impenetrable encrypted versions of themselves. The other creates a virtual disc drive that, when open, behaves like any other drive on your system. When you lock the virtual drive, all of the documents that you put into it are completely inaccessible. .

Like the digital drive solution, a few products save your encrypted information in the cloud. This approach demands extreme caution, obviously. Encrypted information in the cloud has a much bigger attack surface than encrypted data on your own PC.

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Which is better It really depends on how you plan to use encryption. If you are not sure, take advantage of this 30-day free trial offered by each one of these products to have a feel for the different options.

After you copy a file into protected storage, or make an encrypted version of it, then you absolutely need to wipe the unencrypted original. Simply deleting it isn't sufficient, even in the event that you skip the Recycle Bin, since the data still exists on disc, and data recovery utilities can often get it back. .

Some encryption products avoid this issue by encrypting the document in location, literally overwriting it on disc with an encrypted version. It is more common, however, to provide safe deletion as an option. If you choose something that lacks this feature, you should find a free secure deletion tool to use along with it. .

Overwriting data before deletion is sufficient to balk software-based retrieval tools. Hardware-based forensic retrieval works because the magnetic recording of data on a hard drive isn't actually digital. It is more of a waveform. In simple terms, the procedure involves nulling out the known data and reading around the edges of what's left.

An encryption algorithm is similar to a black box. Dump a document, picture, or other document into it, and you get back what visit our website seems like gibberish. Run that gibberish back via the box, using the same password, and you get back the original.

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The U.S. government has depended on Advanced Encryption Standard (AES) as a standard, and all the products gathered here support AES. Even those that support other algorithms tend to recommend using AES.

If you are an encryption specialist, you may want another algorithm, Blowfish, perhaps, or the Soviet government's GOST. For the typical consumer, however, AES is just fine.

Passwords are important, check this site out and you must keep them secret, right Well, not when you use Public Key Infrastructure (PKI) cryptography.

With PKI, you get two keys. One is public; you can discuss it with anyone, register it in a key exchange, tattoo it on your foreheadwhatever you like. Another is private, and should be carefully guarded. If I want to send you a secret document, I simply encrypt it with your public key.

Simple! .

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Using this system in reverse, you can create a digital signature which shows that your document came from you and hasn't been modified. How Exactly To encrypt it with your private key. The fact your public key decrypts it is all the proof you need. PKI service is less common than support for traditional symmetric algorithms. .

If you want to talk about a document with someone and your encryption application doesn't support PKI, there are different options for sharing. Many products enable creation of a self-decrypting executable file. You may also find my blog that the recipient can use a complimentary, decryption-only tool.

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