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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 to get a back door to get beyond 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 Since the moment a back door or similar hack exists, it will become a goal, a prize for the bad guys. It'll flow sooner or later. In a talk at Black Hat this past summer, Apple's Ivan Krstic disclosed the company has done something similar in their cryptographic servers.
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Apple can't update thembut the poor guys can't get in either. .
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 protected. The two main approaches in encryption utilities parallel these options.
One type of product simply processes files and folders, turning them into impenetrable encrypted versions of themselves. Another creates a virtual disc drive that, when open, acts like any other drive on your system. When you lock the virtual drive, each the documents you put into it are completely inaccessible. .
Similar to the virtual drive solution, some goods store your encrypted information 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 to use encryption. If straight from the source you are not sure, take advantage of the 30-day free trial provided by each of those products to get a feel for the different options.
After you copy a document into protected storage, or create an encrypted version of it, then you absolutely need to wipe the unencrypted original. Simply deleting it isn't sufficient, even if you bypass the Recycle Bin, because the information still exists on disc, and data recovery utilities can often get it back. .
Some encryption products avoid this problem by encrypting the document in location, 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 feature, 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 functions 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 like a black box. Dump a document, image, or other document into it, and you get back what seems like gibberish. Run that gibberish back via the box, using 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 all of the merchandise gathered here support AES. Even those that support other algorithms tend to recommend using AES.
If you're an encryption specialist, you may want another algorithm, Blowfish, possibly, or even the Soviet government's GOST. check my blog 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 receive two keys. One is public; you can share it with anyone, register it in an integral exchange, tattoo it on your foreheadwhatever you prefer. 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 make an electronic signature that shows that 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 service is less common than support for traditional symmetric algorithms. .
If you want to talk about 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 may also find that the recipient can use a complimentary, decryption-only tool.