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Using a VPN is a great way to protect your internet traffic when you're traveling, but it is not a solution for encrypting your local 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 employ hackers to get into the phone.

Why wouldn't Apple help Since the moment a rear door or similar hack is different, it will become a target, a prize for the poor guys. It will flow sooner or later. In a talk at Black Hat this past summer, Apple's Ivan Krstic disclosed 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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Each of the products in this roundup explicitly say that they have no back door, and that is as it should be. It will mean that in the event you encrypt an essential document and then forget the encryption password, then you've lost it for good.

Back in the day, in the event that you wanted to keep 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 these options.

One type of product simply procedures files and folders, turning them into impenetrable encrypted versions of these. The other creates a virtual disk drive that, when open, behaves like any other drive on your system. When you lock the virtual drive, all of the documents that you put into it are entirely inaccessible. .

Similar to the digital drive solution, some goods save your encrypted data in the cloud. This approach 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 to use encryption. If you are not sure, take advantage of the 30-day free trial offered by each one of these products to get a sense of the different options.

After you copy a file into protected storage, or create an encrypted version of it, you definitely 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 disk, 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 with an encrypted version. It is more common, though, to provide secure deletion as an option. If you choose something that lacks this feature, 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 works since the magnetic recording of data on a hard drive isn't actually digital. It's more of a waveform. In simple terms, the procedure Continue involves nulling out the known data and reading around the edges of what is left.

An encryption algorithm is like a black box. Dump a document, picture, or other document 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 depended on Advanced Encryption Standard (AES) as a standard, and all of 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 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 discuss it with anyone, register it in a key exchange, tattoo it on your foreheadwhatever you like. The other is personal, 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 make a digital signature which proves your document came from you and hasn't been modified. How Exactly To encrypt it with your private key. The simple fact that your public key decrypts it is all the evidence you need. PKI service is less common go 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 different options for sharing. Many products allow creation of a self-decrypting executable file. You could also find that the recipient can use a free, decryption-only tool.

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