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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 local 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 needed to hire hackers to get into the phone.

Why wouldn't Apple help Because the moment a back door or comparable hack is different, it becomes a target, a decoration for the poor guys. It'll leak sooner or later. In a discussion at Black Hat last summer, Apple's Ivan Krstic disclosed 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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All the products in this roundup explicitly state they have no back door, and that is 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 could 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 those options.

One type of product simply processes files and folders, turning them into impenetrable encrypted versions of these. Another creates a virtual disk drive 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 digital drive solution, a few goods save your encrypted data in the cloud. This strategy requires extreme care, obviously. Encrypted information in the cloud has a much larger attack surface than encrypted data on your own PC.



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

Once you copy a file into secure storage, or make 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, since the information still exists on disc, and data recovery 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 is more common, however, to provide safe 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 information before deletion is sufficient to balk software-based retrieval tools. Hardware-based forensic retrieval works because the magnetic recording of information 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 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 via the box, using the same password, and you get back the original.



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The U.S. government has settled on Advanced Encryption site link Standard (AES) as a standard, and every one of 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 prefer another algorithm, Blowfish, possibly, or 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 discuss it with anyone, register it in a key exchange, tattoo it on your foreheadwhatever you like. The other is personal, 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 program in reverse, you can make a digital signature which proves 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 the evidence you need. PKI service is less common than service 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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