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Using a VPN is a terrific 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 for a rear door to get past the encryption. But 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 Since the moment a rear door or similar hack is different, it becomes a goal, a prize for the poor guys. It'll flow sooner or later. In a talk at Black Hat this past summer, Apple's Ivan Krstic disclosed 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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Each the products in this roundup explicitly say 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 that the encryption password, then 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 protected. The two main methods in encryption utilities parallel these options.

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

Similar to the digital drive solution, some goods save your encrypted data in the cloud. This approach demands extreme care, obviously. Encrypted information in the cloud has a much bigger attack surface than encrypted data on your own PC.

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Which is better It really depends on how you plan to use encryption. If you're not sure, take advantage of the 30-day free trial offered by each of these products to get check out this site a feel for the different options.

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

Some encryption products avoid this problem by encrypting the file in place, literally overwriting it on disk using an encrypted version. It is more common, however, to provide secure 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 retrieval tools. Hardware-based forensic retrieval functions because 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 is 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 through the box, with 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 merchandise accumulated here support AES. Even those that support other calculations tend to recommend using AES.

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

Passwords are important, and you must keep them confidential, 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 a key 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 key document, I just encrypt it with your public key.

Simple! .

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Using this program in reverse, you can make an electronic signature that proves your document came from you and hasn't been altered. How Just 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 service 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 free, decryption-only tool.

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