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Using a VPN is a terrific way to shield 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 shot's iPhone, they asked Apple to get a back door to get beyond the encryption. But no such back door existed, and Apple refused to make one. The FBI had to employ hackers to get into the phone.

Why wouldn't Apple help Since the moment a back door or comparable hack exists, it becomes a target, a decoration for the poor guys. It'll flow sooner or later. In a discussion at Black Hat this past summer, Apple's Ivan Krstic revealed that 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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All the products in this roundup explicitly state they have no back door, and that's as it should be. It will mean that in the event you encrypt an essential document and then forget that the encryption password, you have lost it for good.

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

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

Similar to the digital drive solution, a few products store your encrypted data in the cloud. This strategy requires extreme caution, obviously. Encrypted information in the cloud has a far bigger attack surface than encrypted data on your own PC.

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

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

Some encryption products prevent this problem by encrypting the document in place, literally overwriting it on disc using an encrypted version. It is more common, though, to offer safe deletion as an option. If you choose something that lacks this feature, you ought to find a free secure deletion tool to use along with it. .

Overwriting information before deletion is sufficient to balk software-based recovery tools. Hardware-based forensic recovery 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 process involves nulling out the known data and reading around the edges of what is left.

An encryption algorithm is similar to a black box. Dump a document, image, or other document into it, and you get back what sounds like gibberish. Run that gibberish back through the box, with the exact 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 products gathered here service AES. Even those that support other calculations tend to recommend using AES.

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

Passwords are important, and you have to 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 an integral 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 make an electronic signature which shows that your document came from you and hasn't been altered. How Just encrypt it with your private key. The fact that your public key decrypts it's all the evidence you need. PKI support is less common than service for Full Report traditional symmetric algorithms. .

If you want to share a file 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 complimentary, decryption-only tool.

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