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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 back door to get beyond 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 Because the moment a back door or comparable hack exists, it becomes a target, a prize for the bad guys. It'll 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 them, but the poor guys can't get in either. .
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 could lock it up in a protected. The two main methods in encryption utilities parallel these options.
One sort of product simply procedures files and folders, turning them into impenetrable encrypted versions of themselves. The other creates a virtual disc drive that, when open, acts like any other drive on your system. When you lock the digital drive, all the files you put into it's completely inaccessible. .
Like the virtual drive solution, some goods store your encrypted information in the cloud. This approach requires extreme caution, obviously. Encrypted data in the cloud has a far bigger attack surface than encrypted data on your own PC.
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Which is better It actually depends on how you plan to use 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.
After you copy a file into secure storage, or make an encrypted version of it, you absolutely need to wipe out the unencrypted original. Simply deleting it isn't sufficient, even if you bypass the Recycle Bin, since the data still exists on disc, and data recovery utilities can often return back. .
Some encryption products prevent this Home Page issue by encrypting the file in place, literally overwriting it on disk with an encrypted version. It's more common, however, to offer safe deletion as an option. If you select a product that lacks this attribute, you should 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 recovery functions because the magnetic recording of information 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 file 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 settled on Advanced Encryption Standard (AES) as a standard, and all the merchandise gathered here service AES. Even those that support other calculations 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 confidential, right Well, not when you use Public Key Infrastructure (PKI) cryptography.
With PKI, you receive two keys. One is public; you can share it with anyone, register it in a key exchange, tattoo it on your foreheadwhatever you like. Another is personal, and needs to 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 make an electronic 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 your public key decrypts it's all the proof you need. PKI support is less common than service for traditional symmetric algorithms. .
If you want to share a file with someone and your encryption tool doesn't support 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 free, decryption-only tool.