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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 regional 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 needed to employ hackers to get into the phone.

Why wouldn't Apple help Because the moment a rear door or comparable hack exists, it will become a target, a prize for the poor guys. It'll flow sooner or later. In a discussion at Black Hat this past summer, Apple's Ivan Krstic revealed that the company has done something similar in their cryptographic servers.

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Apple can't update them, but the bad guys can't get in either. .

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All of the products in this roundup explicitly state they have no back door, and that is as it should be. It does 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, in the event that you wanted to keep a document secret you can use a cipher to encrypt it and then burn the original. Or you could lock it up in a safe. 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 these. 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 the files you put into it are entirely inaccessible. .

Similar to the virtual drive solution, a few products store your encrypted data in the cloud. This approach requires extreme caution, 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 to use encryption. If you're not sure, take advantage of this 30-day free trial provided by each one of these products to get a sense of the different options.

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

Some encryption products avoid this problem by encrypting the file in location, literally overwriting it on disk using an encrypted version. It's more common, though, to provide safe deletion as an option. If you select a product 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 retrieval tools. Hardware-based forensic recovery functions since the magnetic recording of data on a hard drive isn't actually digital. It's more of a waveform. In simple terms, the process involves nulling out the known information and reading around the borders of what's left.

An encryption algorithm is similar to a black box. Dump a try here document, picture, or other file 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 of the products accumulated here support AES. Even the ones that support other algorithms tend to recommend using AES.

If you are an encryption expert, you may 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 have to 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 discuss it with anyone, enroll it in a key exchange, tattoo it on your foreheadwhatever you prefer. Another is personal, and needs to be closely guarded. If I want to send you a key document, I just encrypt redirected here it with your public key.

Simple! .

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Using this program in reverse, you can create a digital signature which shows that your document came from you and hasn't been altered. How Exactly To encrypt it with your private key. The simple fact your public key decrypts it is all the proof you need. PKI support is less common than support 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 enable creation check over here of a self-decrypting executable file. You may also find that the recipient can use a complimentary, decryption-only tool.

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