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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 shooter's iPhone, they asked Apple for a back door to get beyond the encryption. However, no such back door existed, and Apple refused to create 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 is different, it becomes a target, a decoration for the bad guys. It'll leak sooner or later. In a talk 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 thembut the poor guys can't get in either. .

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

Back in the day, in the event that you wanted to maintain a document secret you can 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 these 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 virtual drive, all the documents you put into it are entirely inaccessible. .

Like the virtual drive solution, some products save your encrypted information in the cloud. This approach requires extreme care, obviously. Encrypted data in the cloud has a much bigger 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 this 30-day free trial offered by each of look at here now these products to get a feel for the different options.

Once you copy a file into secure storage, or make an encrypted version of it, you absolutely need to wipe the unencrypted original. Just deleting it isn't sufficient, even if you skip the Recycle Bin, since the data still exists on disk, and data recovery utilities can often return back. .

Some encryption products prevent this issue by encrypting the document in location, literally overwriting it on disk using an encrypted version. It's more common, though, to offer secure deletion as an option. If you select something 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 recovery tools. Hardware-based forensic recovery functions because 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 data and reading around the edges 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 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 depended on Advanced Encryption Standard (AES) as a standard, and all of the merchandise gathered here service AES. Even the ones that support other algorithms tend to recommend using AES.

If you are an encryption specialist, you might want another algorithm, Blowfish, possibly, or the Soviet government's GOST. For the average user, however, AES is just fine.

Passwords are important, and you have to 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 discuss it with anyone, register it in a key exchange, tattoo it on your foreheadwhatever you prefer. Another is personal, and needs to be carefully guarded. If I want click to find out more 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 create an electronic signature which proves your document came from you and hasn't been modified. How Just encrypt it with your private key. The fact that your public key decrypts it's all of the evidence you need. PKI service is less common than support for traditional symmetric algorithms. .

If you want to talk about a file with someone and your encryption tool doesn't support PKI, there are different options for sharing. Many products enable creation of a self-decrypting executable file. You could also find that the recipient can use a complimentary, decryption-only tool.