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Using a VPN is a great 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 shot's iPhone, they asked Apple for a back door to get past 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 Because the moment a back door or comparable hack exists, it becomes a target, a prize for the bad guys. It will leak sooner or later. In a talk at Black Hat last summer, Apple's Ivan Krstic revealed 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 of the products in this roundup explicitly state they have no back door, and that's 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 keep a document secret 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 these options.

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

Similar to the digital drive solution, some goods store your encrypted information in the cloud. This strategy requires 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 actually depends on how you plan on using encryption. If you are not sure, take advantage of this 30-day free trial provided 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 out the unencrypted original. Simply deleting it isn't sufficient, even in the event that you skip the Recycle Bin, since the data still exists on disk, and data recovery utilities can often get it back. .

Some encryption products prevent this issue why not look here by encrypting the file in place, literally overwriting it on disk with an encrypted version. It's more common, however, to provide safe deletion as an option. If you choose 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 retrieval works because the magnetic recording of data on a hard drive isn't actually digital. It's more of a waveform. In simple terms, the procedure involves nulling out the known information and reading around the borders of what's 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 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 all the merchandise accumulated here service AES. Even the ones that support other algorithms tend to recommend using AES.

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

Passwords are important, and you must keep them confidential, right Well, not when you use Public Key Infrastructure (PKI) cryptography.

With PKI, you receive two keys. One is public; you can share it with anyone, enroll it in a key exchange, tattoo it on your foreheadwhatever you prefer. Another is private, and should be carefully guarded. If I want to send you a key 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 modified. How Just encrypt it with your private key. The fact 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 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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