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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 shooter's iPhone, they asked Apple to get a back door to get past the encryption. However, no such back door existed, and Apple refused to make one. The FBI needed to hire hackers to get into the phone.

Why wouldn't Apple help Because the moment a back door or comparable hack exists, it will become a goal, a decoration for the bad guys. It will 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 thembut the poor guys can't get in either. .



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

Back in the day, if 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 safe. The two main methods in encryption utilities parallel these options.

One sort of product simply processes files and folders, turning them into impenetrable encrypted versions of these. Another creates a virtual disc drive that, when open, acts like any other drive on your system. When you lock the digital drive, each the documents you put into it are entirely inaccessible. .

Like the virtual drive solution, a few products save your encrypted information 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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Which 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 provided by each one of these products to get a feel for the different options.

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

Some encryption products prevent this issue by encrypting the document in location, literally overwriting it on disc using an encrypted version. It's more common, though, to offer secure deletion as an option. If you choose site web a product that lacks this feature, you ought to find a free secure deletion tool to use along with it. .

Overwriting information before deletion is sufficient to balk software-based retrieval 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 information and reading around the borders of what is left.

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

If you're an encryption specialist, you might prefer another algorithm, Blowfish, perhaps, or even the Soviet government's GOST. For the average user, however, AES is just fine.

Passwords are important, and you must 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 an integral exchange, tattoo it on your foreheadwhatever you like. The other is private, and needs to be carefully 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 an electronic signature that proves your document came from you and hasn't been altered. How Exactly To encrypt it with your private key. The simple fact that your public key decrypts it's all the evidence 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 of a self-decrypting executable file. You may also find that the recipient can use a complimentary, decryption-only tool.

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