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

When the FBI needed information from the San Bernardino shooter's iPhone, they asked Apple for a rear 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 rear door or comparable hack exists, it will become a target, a decoration for the bad guys. It will leak sooner or later. In a discussion at Black Hat this past 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. .

All the products in this roundup explicitly say they have no rear door, and that's as it should be. It does mean that if you encrypt an essential document and then forget that 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 could lock it up in a protected. The two main methods in encryption utilities parallel with these options.

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

Similar to the digital drive solution, some goods store your encrypted data in the cloud. This strategy demands extreme caution, 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 sense of the different options.

Once you copy a file into secure storage, or make an encrypted version of it, then you absolutely need to wipe out the unencrypted original. Just deleting it isn't sufficient, even if you skip the Recycle Bin, because the data still exists on disc, and data recovery utilities can often get it back. .

Some encryption products prevent this issue by encrypting the file in place, literally overwriting it on disk with an encrypted version. It's more common, though, to provide secure deletion as an option. If you choose a product that lacks this attribute, you ought to 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 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, image, or other file into it, and you get back what seems like gibberish. Run that gibberish back via the box, with 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 gathered here service AES. Even those that support other algorithms tend to recommend using AES.

If you are an encryption expert, you may want 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 have to keep them secret, recommended you read right Well, not when you use Public Key Infrastructure (PKI) cryptography.

With PKI, you get 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 personal, and should 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 make a digital signature that shows that your document came from you and hasn't been modified. How Exactly To encrypt it with your private key. The fact 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 share a document with someone and your encryption tool doesn't support PKI, there are different 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.