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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 shot's iPhone, they asked Apple for a back door to get past the encryption. But no such back door existed, and Apple refused to make one. The FBI had to employ hackers to get into the phone.

Why wouldn't Apple help Since the moment a back door or similar hack exists, it becomes a goal, a decoration for the bad guys. It'll 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 them, but the poor guys can't get in either. .

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All the products in this roundup explicitly say that they have no rear door, and that's as it should be. It will mean that if you encrypt an essential document and then forget that the encryption password, then you've lost it for good.

Back in the day, if you wanted to maintain a document secret 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. The other creates a virtual disk that, when open, behaves like any other drive on your system. When you lock the virtual drive, each of the documents you put into it's completely inaccessible. .

Like the digital drive solution, a few goods store your encrypted information in the cloud. This strategy requires extreme caution, 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 really depends on how you plan on using encryption. If you are not sure, take advantage of this 30-day free trial offered by each of these products to have a sense of the different options.

After you copy a file into protected storage, or make an encrypted version of it, you absolutely need to wipe out the unencrypted original. Just deleting it isn't sufficient, even if you skip the Recycle Bin, because the data still exists on disc, and data recovery utilities can often get it back. .

Some encryption products prevent this problem by encrypting the file in location, literally overwriting it on disk using an encrypted version. It is more common, however, to offer secure deletion as an option. If you select a product that lacks this feature, you ought to 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 recovery functions since the magnetic recording of data on a hard drive isn't actually digital. It is more of a waveform. In simple terms, the process involves nulling out the known information and reading around the edges of what is 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 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 gathered here service AES. Even the ones that support other calculations tend to recommend using AES.

If you are an encryption specialist, you may want another algorithm, Blowfish, perhaps, or even the Soviet government's GOST. For the typical user, 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 receive two keys. One is public; you can share it with anyone, enroll it in a key exchange, tattoo it on your foreheadwhatever you like. Another is private, and needs to be carefully 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 program in reverse, you can create a digital signature which proves your document came from you and hasn't been modified. How Exactly To encrypt it with your private key. The fact that your public key decrypts it's all the evidence you need. PKI support is less common than support for important source traditional symmetric algorithms. .

If you want to share a document with someone and your encryption tool doesn't support PKI, there are different 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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