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

When the FBI needed information from the San Bernardino shot'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 create one. The FBI had to employ hackers to get into the phone.

Why wouldn't Apple help Because the moment a back door or similar hack exists, it becomes a goal, a prize for the poor guys. It'll leak sooner or later. In a talk at Black Hat last summer, Apple's Ivan Krstic disclosed 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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Each of the products in this roundup explicitly state that they have no rear door, and that is as it should be. It does mean that in the event you encrypt an essential document and then forget that the encryption password, then you've lost it for good.

Back in the day, if 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 approaches in encryption utilities parallel these options.

One sort of product simply procedures files and folders, turning them into impenetrable encrypted versions of themselves. The other creates a virtual disk that, when open, behaves 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 store your encrypted data in the cloud. This strategy requires extreme care, obviously. Encrypted data in the cloud has a much larger 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 are not sure, take advantage of this 30-day free trial provided by each one of these products to get a feel for the different options.

Once you copy a document into protected storage, or make an encrypted version of it, then you definitely need to wipe the unencrypted original. Simply deleting it isn't sufficient, even in the event that you bypass the Recycle Bin, because the information still exists on disc, and data recovery utilities can often get it back. .

Some encryption products avoid this problem by encrypting the file in location, literally overwriting it on disc using an encrypted home version. It is 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 retrieval tools. Hardware-based forensic retrieval functions because 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's left.

An encryption algorithm is like a black box. Dump a document, image, or other document into it, and you get back what sounds like gibberish. Run that gibberish back via the box, using the exact 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 the merchandise accumulated here service AES. Even those that support other algorithms tend to recommend using AES.

If you are an encryption specialist, you might prefer another algorithm, Blowfish, possibly, or even the Soviet government's GOST. For the typical consumer, 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 get two keys. One is public; you can discuss it with anyone, register it in an integral exchange, tattoo it on your foreheadwhatever you like. Another is personal, and needs to be carefully 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 that proves your document came from you and hasn't been modified. How Exactly To encrypt it with your private key. The simple fact your public key decrypts it is all the evidence you need. PKI support is less common than service for traditional symmetric algorithms. .

If you want to share a document 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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