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Using a VPN is a great way to protect your internet traffic when you're 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 beyond the encryption. But no such back door existed, and Apple refused to create one. The FBI needed to employ hackers to get into the phone.

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

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Apple can't update them, but the poor 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 is as it ought to be. It does mean that in the event you encrypt an essential document and then forget the encryption password, you have lost it for good.

Back in the day, if you wanted to keep a document secret you can use a cipher to encrypt it and then burn the original. Or you might lock it up in a safe. The two main methods in encryption utilities parallel these options.

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

Like the virtual drive solution, some goods store your encrypted data in the cloud. This strategy 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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That is better It really depends on how you plan on using encryption. If you're not sure, take advantage of the 30-day free trial provided by each one of these products to get a feel for the different options.

After you copy a document into protected storage, or create an encrypted version of it, you absolutely need to wipe the unencrypted original. Just deleting it isn't sufficient, even if you bypass the Recycle Bin, since the information still exists on disc, and data recovery utilities can often return back. .

Some encryption products avoid this problem by encrypting the file in location, literally overwriting it on disc with an encrypted version. It's more common, however, to provide secure deletion as an option. If you select 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 recovery tools. Hardware-based forensic recovery works since the magnetic recording of information 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 borders 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 sounds like gibberish. Run that gibberish back via the box, with the same password, and you get back the original.

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The U.S. government has settled on Advanced Encryption Standard (AES) as a standard, and every one of the merchandise gathered here support AES. Even those that support other calculations tend to recommend using AES.

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

Passwords are important, and you have to keep them confidential, right Well, not when you use Public Key Infrastructure (PKI) cryptography.

With PKI, you receive two keys. One is public; you can discuss it with anyone, enroll it in an integral exchange, tattoo it on your foreheadwhatever you like. Another is personal, and should he said be closely guarded. If I want to send you a key document, I just encrypt it with your public key.

Simple! .

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Using this program 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 simple fact your public key decrypts it is all of 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 tool doesn't support PKI, there are different options for sharing. Many products allow creation of a self-decrypting executable file. You could also find that the recipient can use a free, decryption-only tool.

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