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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 to get a rear door to get past the encryption. But no such back door existed, and Apple refused to create 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 exists, it becomes a target, a prize for the bad guys. It will flow sooner or later. In a discussion 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 thembut the bad guys can't get in either. .

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All of the products in this roundup explicitly state that they have no back door, and that is as it ought to 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, if 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 safe. 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 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, each the documents you put into it's entirely inaccessible. .

Similar to the digital drive solution, a few products store your encrypted information in the cloud. This strategy demands extreme care, obviously. Encrypted information in the cloud has a far larger attack surface than encrypted data on your own PC.

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Which is better It really 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 those products to have a sense of the different options.

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

Some encryption products avoid this issue by encrypting the document in location, literally overwriting it on disk with an encrypted version. It is more common, however, to provide secure deletion as an option. If you choose something 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 recovery tools. Hardware-based forensic recovery 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 Home Page procedure involves nulling out the known information and reading around the edges of what's left.

An encryption algorithm is similar to a black box. Dump a document, picture, 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 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 specialist, you might prefer another algorithm, Blowfish, perhaps, or the Soviet government's GOST. For the average user, however, AES is just fine.

Passwords are important, and you have to 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 a key exchange, tattoo it on your foreheadwhatever you prefer. Another is private, and should be closely guarded. If I want to send you a secret document, I just encrypt it with your public key.

Simple! .

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Using this program in reverse, you can create a digital signature that shows that 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 is all the proof you need. PKI service is less common than service for traditional symmetric algorithms. .

If you want to talk about a document with someone and your encryption tool doesn't support PKI, there are other options for browse around these guys sharing. Many products allow 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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