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Using a VPN is a terrific way to shield 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 shot's iPhone, they asked Apple for a rear door to get past the encryption. However, no such back door existed, and Apple refused to create one. The FBI had to hire hackers to get into the phone.

Why wouldn't Apple help Because the moment a back door or similar hack is different, it becomes a target, a decoration for the poor guys. It'll flow sooner or later. In a discussion at Black Hat last 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 thembut the bad guys can't get in either. .

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Each the products in this roundup explicitly state that they have no rear door, and that's as it should be. It does mean that in the event you encrypt an essential document and then forget the encryption password, you have lost it for good.

Back in the day, in the event that 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 safe. The two main approaches in encryption utilities parallel with those options.

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

Similar to the digital drive solution, some products save your encrypted information in the cloud. This approach demands 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 really depends on how you plan to use encryption. If you are not sure, take advantage of the 30-day free trial provided by each one 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 out the unencrypted original. Simply deleting it isn't sufficient, even if you skip the Recycle Bin, because the information still exists on disc, and data retrieval utilities can often get it back. .

Some encryption products avoid this issue by encrypting the file in place, literally overwriting it on disk using an encrypted version. It's more common, though, to provide safe 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 retrieval works because the magnetic recording of information on a hard drive isn't actually digital. It's more of a waveform. In simple terms, the process 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 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 every one of the merchandise gathered here support AES. Even those that support other calculations tend to recommend using AES.

If you are an encryption specialist, you might 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 confidential, right Well, not when you use Public Key get more Infrastructure (PKI) cryptography.

With PKI, you get two keys. One is public; you can share it with anyone, register it in a key exchange, tattoo it on your foreheadwhatever you prefer. The other is personal, and needs to be carefully guarded. If I want to send you a key document, I just encrypt it with your public key.

Simple! .

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Using this system in reverse, you can create an electronic signature which proves 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 of the evidence you need. PKI support is less common than support for traditional symmetric algorithms. .

If you want to share a file with someone and your encryption application doesn't support PKI, there are other 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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