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Using a VPN is a great way to shield your internet traffic when you're 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 for a rear door to get past the encryption. However, no such back door existed, and Apple refused to make one. The FBI had to hire hackers to get into the phone.

Why wouldn't Apple help Because the moment a back door or comparable hack exists, it will become a target, a prize for the poor guys. It will flow sooner or later. In a discussion 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 poor guys can't get in either. .

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All of the products in this roundup explicitly say that they have no rear door, and that is as it should be. It does 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 secret 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 approaches in encryption utilities parallel those options.

One type of product simply processes files and folders, turning them into impenetrable encrypted versions of themselves. The other creates a virtual disc drive that, when open, acts like any other drive on your system. When you lock the digital drive, all of the documents that you put into it's completely inaccessible. .

Similar to the virtual drive solution, a few products save your encrypted information in the cloud. This approach demands extreme care, obviously. Encrypted data in the cloud has a far bigger 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 the 30-day free trial provided by each of these products to get Trial Trading Account a sense of the different options.

Once you copy a document into protected storage, or create an encrypted version of it, you absolutely need to wipe out the unencrypted original. Simply deleting it isn't sufficient, even if you skip the Recycle Bin, because the data still exists on disk, and data retrieval 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 a product that lacks this attribute, you should find a free secure deletion tool to use along with it. .

Overwriting information before deletion is sufficient to balk software-based recovery tools. Hardware-based forensic recovery 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 data and reading around the borders of what's left.

An encryption algorithm is like a black box. Dump a document, picture, or other document into it, and you get back what sounds 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 Standard (AES) as a standard, and every one the merchandise accumulated here support AES. Even those that support other algorithms tend to recommend using AES.

If you are an encryption specialist, you might prefer another algorithm, Blowfish, perhaps, or the Soviet government's GOST. For the typical 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 share it with anyone, register it in an integral exchange, tattoo it on your foreheadwhatever you prefer. Another is personal, and needs to be closely guarded. If I want to send you a secret document, I simply encrypt it with your public key.

Simple! .

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Using this program in reverse, you can create an electronic signature that shows that your document came from you and hasn't been modified. How Exactly To encrypt it with your private key. The fact your public key decrypts it is all of the proof you need. PKI service is less common than support for traditional symmetric algorithms. .

If you want to talk about a document 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 could also find that the recipient can use a free, decryption-only tool.

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