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

Why wouldn't Apple help Because the moment a rear door or similar hack exists, it will become a target, a decoration for the bad guys. It'll leak 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 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 back door, and that's as it ought to be. It will mean that in the event 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 key 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 methods in encryption utilities parallel with those options.

One type of product simply procedures 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 the files that you put into it's completely inaccessible. .

Like the digital drive solution, some goods save your encrypted data in the cloud. This approach demands extreme care, 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 on using encryption. If you're not sure, take advantage of the 30-day free trial offered by each one of those products to get a feel for the different options.

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

Some encryption products prevent this issue by encrypting the file in location, literally overwriting it on disc with an encrypted version. It is more common, however, to offer safe deletion as an option. If you choose 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 recovery tools. Hardware-based forensic recovery functions since the magnetic recording of information on a hard drive isn't actually digital. It is more of a waveform. In simple terms, the procedure involves nulling out the known data and reading around the edges of what's left.

An encryption algorithm is similar to a black box. Dump a document, picture, or other file 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 settled on Advanced Encryption Standard (AES) as a standard, and all of the products accumulated here important source support AES. Even those that support other algorithms tend to recommend using AES.

If you're an encryption specialist, you may prefer another algorithm, Blowfish, possibly, or 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 receive two keys. One is public; you can share it with anyone, register it in an integral exchange, tattoo it on your foreheadwhatever you like. Another is private, and needs to be closely guarded. If I want 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 a digital signature which shows that 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 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 may also find that the recipient can use a free, decryption-only tool.

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