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Using a VPN is a great 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 shooter's iPhone, they asked Apple to get a back door to get past the encryption. But 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 Since the moment a rear door or similar hack is different, it becomes a goal, a prize for the bad guys. It will leak sooner or later. In a talk 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 them, but the poor guys can't get in either. .

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All the products in this roundup explicitly state that they have no back door, and that's as it ought to be. It does 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, if you wanted to keep a document secret you can use a cipher to encrypt it and then burn the original. Or you could lock it up in a safe. 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 themselves. Another creates a virtual disk drive that, when open, acts like any other drive on your system. When you lock the virtual drive, all the documents that you put into it's completely inaccessible. .

Similar to the virtual drive solution, a few goods save your encrypted data in the cloud. This approach 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 really depends on how you plan to use encryption. If you are not sure, take advantage of this 30-day free trial offered by each one of these products to have a sense of the different options.

After you copy a file into protected storage, or create an encrypted version of it, then you definitely need to wipe the unencrypted original. Simply deleting it isn't sufficient, even in the event that you skip the Recycle Bin, because the information still exists on disc, and data recovery utilities can often get it back. .

Some encryption products avoid this issue by encrypting the file in location, literally overwriting it on disk using an encrypted version. It's more common, though, to offer safe deletion as an option. If you choose a product 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 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 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 sounds 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 every one of the merchandise gathered here service AES. Even those that support other calculations tend to recommend using AES.

If you are an encryption expert, you may prefer another algorithm, Blowfish, perhaps, or the Soviet government's GOST. For the typical consumer, however, AES is just fine.

Passwords are important, and you have to 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 an integral exchange, tattoo it on your foreheadwhatever you like. Another is private, and needs to be closely 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 system in reverse, you can make a digital signature that shows that your document came from you and hasn't been modified. How Just encrypt it with your private my link key. The simple fact your public key decrypts it's all of the proof you need. PKI support is less common than support for traditional symmetric algorithms. .

If you want to share a file with someone and your encryption application doesn't support additional reading PKI, there are different options for sharing. Many products enable creation of a self-decrypting executable file. You could also find that the recipient can use a complimentary, decryption-only tool.

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