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Using a VPN is a great 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 beyond 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 similar hack exists, 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 disclosed 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 state they have no rear door, and that is as it ought to 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 keep a document key you could use a cipher to encrypt it and then burn the original. Or you might lock it up in a protected. The two main methods in encryption utilities parallel those options.

One type of product simply procedures files and folders, turning them into impenetrable encrypted versions of themselves. Another creates a virtual disc drive that, when open, behaves like any other drive on your system. When you lock the digital drive, all of the documents that you put into it are entirely inaccessible. .

Like the virtual drive solution, a few products store your encrypted information in the cloud. This strategy demands extreme caution, obviously. Encrypted information in the cloud has a far larger 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 are not sure, take advantage of this 30-day free trial offered by each one of those products to get a feel for the different options.

Once you copy a file into secure storage, or make an encrypted version of it, then you definitely need to wipe the unencrypted original. Simply deleting it isn't sufficient, even index in the event that you bypass the Recycle Bin, since the data still exists on disc, and data recovery utilities can often return back. .

Some encryption products prevent this problem by encrypting the file in place, literally overwriting it on disk with an encrypted version. It's more common, however, to provide secure 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 information before deletion is sufficient to balk software-based retrieval tools. Hardware-based forensic retrieval works since 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 data and reading around the edges of what is left.

An encryption algorithm is like a black box. Dump a document, picture, or other file into it, and you get back what sounds like gibberish. Run that gibberish back via the box, with the exact same password, and you get back the original.

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The U.S. government has settled on Advanced go now Encryption Standard (AES) as a standard, and all of the merchandise accumulated here support AES. Even those that support other calculations tend to recommend using AES.

If you are an encryption specialist, you might want another algorithm, Blowfish, perhaps, 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 discuss it with anyone, enroll 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 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 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 proof you need. PKI support is less common than service for traditional symmetric algorithms. .

If you want to talk about a file with someone and your encryption application doesn't support PKI, there are other 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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