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Using a VPN is a terrific way to shield your internet traffic when you are traveling, but it is 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 rear door to get beyond the encryption. However, no such back door existed, and Apple refused to make one. The FBI needed to employ hackers to get into the phone.

Why wouldn't Apple help Since the moment a rear door or comparable hack exists, it becomes a goal, 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 of the products in this roundup explicitly say that they have no rear door, and that is as it should be. It does mean that in the event you encrypt an essential document and then forget that the encryption password, you've lost it for good.

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

One type of product simply processes files and folders, turning them into impenetrable encrypted versions of these. Another creates a virtual disc drive that, when open, acts like any other drive on your system. When you lock the digital 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 information in the cloud. This strategy demands extreme care, obviously. Encrypted data in the cloud has a much larger 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're not sure, take advantage of the 30-day free trial offered by each of these products to get a feel for the different options.

After you copy a file into secure 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 retrieval utilities can often return back. .

Some encryption products prevent this issue by encrypting the document in place, literally overwriting it on disk with an encrypted version. It's more common, though, to provide safe deletion as an option. If you select something that lacks this attribute, you ought to find a free secure deletion tool to use along with it. .

Overwriting information before deletion is sufficient to balk software-based Continue 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 process involves nulling out the known data and reading around the borders of what is left.

An encryption algorithm is similar to a black box. Dump a document, image, or other file 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 the products gathered here service AES. Even those that support other calculations tend to recommend using AES.

If you're an encryption expert, you may want another algorithm, Blowfish, possibly, or the Soviet government's GOST. For the average user, 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 get two keys. One is public; you can share it with anyone, enroll it in a key exchange, tattoo it on your foreheadwhatever you like. Another is personal, and should be closely 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 program in reverse, you can make a digital signature which shows that your document came from you and hasn't been altered. How Just encrypt it with your private key. The simple fact that your public key decrypts it is all the proof you need. PKI support is less common than service for traditional symmetric algorithms. .

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

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