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Using a VPN is a great way to protect your internet traffic when you're traveling, but it is 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 create one. The FBI needed to hire hackers to get into the phone.

Why wouldn't Apple help Since the moment a rear door or similar hack exists, it becomes a goal, a decoration for the poor guys. It will flow sooner or later. In a talk at Black Hat last 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 thembut the bad guys can't get in either. .

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All of the products in this roundup explicitly state they have no back door, and that is as it ought to be. It will mean that if you encrypt an essential document and then forget that the encryption password, you have lost it for good.

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

One sort of product simply processes 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 the files that you put into it's completely inaccessible. .

Similar to the virtual drive solution, some goods save your encrypted data in the cloud. This strategy demands extreme caution, obviously. Encrypted data in the cloud has a much larger 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're 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.

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

Some encryption products avoid this problem by encrypting the file in place, literally overwriting it on disk using an encrypted version. It's more common, though, to offer 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 retrieval tools. Hardware-based forensic recovery functions because the magnetic recording of data on a hard drive isn't actually digital. It's 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, picture, or other document into it, and you get back what seems like gibberish. Run that gibberish back through the great site box, with the exact 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 every one the merchandise gathered here service AES. Even the ones that support other calculations tend to recommend using AES.

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

Passwords are important, 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, enroll it in a key exchange, tattoo it on your foreheadwhatever you like. The other is private, and should be closely guarded. If I want to send you a secret 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 that proves your document came from you and hasn't been altered. How Exactly To encrypt it with your private key. The simple fact that your public key decrypts it's all of the proof 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 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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