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Using a VPN is a great way to protect your internet traffic when you're traveling, but it is not a solution for encrypting your regional files. .

When the FBI needed information from the San Bernardino shooter's iPhone, they asked Apple to get a rear door to get beyond the encryption. But no such back door existed, and Apple refused to make one. The FBI needed to employ hackers to get into the phone.

Why wouldn't Apple help Since the moment a rear door or comparable hack exists, it becomes a goal, a prize for the poor guys. It will flow 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. .

Each the products in this roundup explicitly state that they have no rear door, and that is as it should be. It will mean that if you encrypt an essential document and then forget that the encryption password, 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 approaches in encryption utilities parallel with these options.

One type of product simply processes files and folders, turning them into impenetrable encrypted versions of these. Another creates a virtual disc drive that, when open, behaves like any other drive on your system. When you lock the digital drive, each the documents you put into it's 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 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 of those products to get a feel for the different options.

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

Some encryption products avoid this issue by encrypting the file in place, literally overwriting it on disk with an encrypted version. It is more common, though, to offer 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 data before deletion is sufficient to balk software-based recovery tools. Hardware-based forensic recovery works since the magnetic recording of information 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 is left.

An encryption algorithm is like a black box. Dump a document, picture, or other file 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 depended on Advanced Encryption Standard (AES) as a standard, and every one the merchandise gathered here service AES. Even those that support other algorithms tend to recommend using AES.

If you're an encryption specialist, you may want another algorithm, Blowfish, possibly, or the Soviet government's GOST. For the typical recommended you read consumer, however, AES is just fine.

Passwords are important, and you have to keep them confidential, 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, enroll it in a key exchange, tattoo it on your foreheadwhatever you prefer. Another is personal, and should 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 system in reverse, you can create a digital signature which shows that your document came from you and hasn't been altered. How Just encrypt it with your private key. The fact that your public key decrypts it is all of the evidence 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 application doesn't support PKI, there are different options for sharing. Many products allow creation of a self-decrypting executable file. You could also find that useful site the recipient can use a complimentary, decryption-only tool.