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Using a VPN is a terrific way to protect your internet traffic when you are traveling, but it is 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 back door to get beyond the encryption. However, 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 rear door or comparable hack is different, it will become 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 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 the products in this roundup explicitly state they have no rear door, and that is as it should be. It will mean that if you encrypt an essential document and then forget the encryption password, you have lost it for good.

Back in the day, in the event that you wanted to keep a document key you can 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 those options.

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

Like the digital drive solution, some goods store your encrypted information in the cloud. This approach demands extreme care, obviously. Encrypted information 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're not sure, take advantage of the 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 secure storage, or make an encrypted version of it, then you absolutely need to wipe the unencrypted original. Simply deleting it isn't sufficient, even a fantastic read if you bypass the Recycle Bin, since the information still exists on disc, and data recovery utilities can often return back. .

Some encryption products avoid this issue by encrypting the file in place, literally overwriting it on disc with an encrypted version. It is more common, however, to offer safe 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 information before deletion is sufficient to balk software-based recovery tools. Hardware-based forensic retrieval works since the magnetic recording of data on a hard drive isn't actually digital. It is more of a waveform. In simple terms, the process involves nulling out the known data and reading around the borders of what is left.

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

If you're an encryption specialist, you might prefer another algorithm, Blowfish, possibly, or even the Soviet government's GOST. For the average user, 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 get two keys. One is public; you can share it with anyone, enroll it in a key exchange, tattoo it on your foreheadwhatever you like. Another is private, and needs to be carefully guarded. If I want to send you a secret document, I simply encrypt it with your public key.

Simple! .

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Using this system in reverse, you can create a digital signature that proves your document came from you and hasn't been modified. How Just encrypt it with your private key. The simple fact your public key decrypts it's all the proof you need. PKI support is less common than support for traditional symmetric algorithms. .

If you want to talk about 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 may also find that the recipient can use a free, decryption-only tool.

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