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Using a VPN is a great way to protect your internet traffic when you are traveling, but it is not a solution for encrypting your local files. .

When the FBI needed information from the San Bernardino shot's iPhone, they asked Apple to get a back door to get past the encryption. However, 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 Because the moment a back door or similar hack is different, it will become a target, a prize for the bad guys. It will flow sooner or later. In a discussion at Black Hat last 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 thembut the poor guys can't get in either. .

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All the products in this roundup explicitly say 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 the encryption password, then you have lost it for good.

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

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

Similar to the virtual drive solution, a few products store your encrypted information in the cloud. This approach demands extreme caution, obviously. Encrypted data 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 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 sense of 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, because the data still exists on disk, and data recovery utilities can often return back. .

Some encryption products prevent this issue by encrypting the document in location, literally overwriting it on disc using an encrypted version. It is more common, though, to provide navigate to this site safe deletion as an option. If you select a product 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 functions 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 edges of what is left.

An encryption algorithm is like 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 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 merchandise gathered here service AES. Even the ones that support other algorithms tend to recommend using AES.

If you are an encryption expert, you may want another algorithm, Blowfish, perhaps, or even the Soviet government's GOST. For the typical user, 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 share it with anyone, register it in an integral exchange, tattoo it on your foreheadwhatever you prefer. The other is private, and should 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 system in reverse, you can make an electronic signature which proves your document came from you and hasn't been modified. How Just encrypt it with your private key. The simple fact that your public key decrypts it's all the evidence you need. PKI support is less common than service for traditional symmetric algorithms. .

If you want to share a file with someone and your encryption application doesn't support PKI, there are other options for sharing. Many products enable 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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