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Using a VPN is a great way to shield your internet traffic when you are traveling, but it's not a solution for encrypting your local 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 needed to hire hackers to get into the phone.

Why wouldn't Apple help Because the moment a back door or comparable hack exists, it becomes a target, a prize for the bad guys. It will flow sooner or later. In a talk at Black Hat this past summer, Apple's Ivan Krstic revealed 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 they have no rear door, and that's as it ought to 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 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 safe. The two main approaches in encryption utilities parallel with those options.

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

Like the digital drive solution, a few products store your encrypted data in the cloud. This strategy demands extreme caution, 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 actually depends on how you plan on using encryption. If you are not sure, take advantage of the 30-day free trial provided by each of these products to get a feel for the different options.

After you copy a file into secure storage, or make an encrypted version of it, you absolutely need to wipe out the unencrypted original. Just deleting it isn't sufficient, even 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 problem by encrypting the document in location, literally overwriting it on disc using an encrypted version. It is more common, however, to offer 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 information before deletion is sufficient to balk software-based retrieval tools. Hardware-based forensic retrieval works because have a peek at these guys the magnetic recording of information on a hard drive isn't actually digital. It is more of a waveform. In simple terms, the process involves nulling out the known information and reading around the borders of what is left.

An encryption algorithm is like 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, 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 accumulated here service AES. Even those that support other algorithms tend to recommend using AES.

If you're an encryption specialist, you may prefer another algorithm, Blowfish, possibly, or even the Soviet government's GOST. For the typical consumer, 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 get two keys. One is public; you can discuss it with anyone, enroll it in a key exchange, tattoo it on your foreheadwhatever you like. The other is personal, and needs to be carefully 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 create an electronic signature which proves your document came from you and hasn't been altered. How Just encrypt it with your private key. The simple fact your public key decrypts it is all the proof you need. PKI support is less common than support 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 complimentary, decryption-only tool.

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