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Using a VPN is a terrific way to protect your internet traffic when you are 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 back door to get past the encryption. However, no such back door existed, and Apple refused to create one. The FBI had to hire hackers to get into the phone.

Why wouldn't Apple help Since the moment a back door or comparable hack is different, it will become a target, a decoration for the poor guys. It'll leak sooner or later. In a discussion at Black Hat this past summer, Apple's Ivan Krstic revealed the company has done something similar in their cryptographic servers.

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Apple can't update them, but the bad guys can't get in either. .

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

Back in the day, if you wanted to maintain a document key you could 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 with those options.

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

Like the digital drive solution, a few goods store your encrypted data in the cloud. This strategy requires extreme care, obviously. Encrypted data in the cloud has a far larger attack surface than encrypted data on your own PC.

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Which is better It actually depends on how you plan to use encryption. If you're not sure, take advantage of this 30-day free trial provided by each one of those products to have a sense of the different options.

Once Trial Trading Account you copy a file into secure storage, or create an encrypted version of it, you definitely need to wipe out the unencrypted original. Simply deleting it isn't sufficient, even in the event that you skip the Recycle Bin, because the data still exists on disk, 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 disc with an encrypted version. It's more common, though, to offer safe deletion as an option. If you choose 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 retrieval tools. Hardware-based forensic retrieval functions because the magnetic recording of data on a hard drive isn't actually digital. It is more of a waveform. In simple terms, the procedure involves nulling out the known information and reading around the edges of what's left.

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

If you're an encryption specialist, you might want another algorithm, Blowfish, perhaps, or the Soviet government's GOST. For the average 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 a key exchange, tattoo it on your foreheadwhatever you like. The other is private, and needs to be carefully 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 make an electronic signature which proves your document came from you and hasn't been altered. How Exactly To encrypt it with your private key. The fact that your public key decrypts it's all of the evidence you need. PKI support is less common than support for traditional symmetric algorithms. .

If you want to talk about a file with someone and your encryption tool 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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