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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 shooter's iPhone, they asked Apple to get 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 Since the moment a back door or similar hack exists, it becomes a goal, a prize for the poor 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 bad 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 safe. 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, behaves like any other drive on your system. When you lock the digital drive, all of the files that you put into it are entirely inaccessible. .
Like the virtual drive solution, a few products store your encrypted information in the cloud. This approach requires extreme caution, obviously. Encrypted information 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 on using encryption. If you're not sure, take advantage of the 30-day free trial provided by each one of those products to get a feel for the different options.
Once you copy a document into protected storage, or make an encrypted version of it, then you definitely need to wipe out the unencrypted original. Just deleting it isn't sufficient, even in the event that you skip the Recycle Bin, since the data still exists on disc, and data retrieval utilities can often return back. .
Some encryption products prevent this issue by encrypting the file in place, literally overwriting it on disc using an encrypted version. It is more common, however, to provide safe deletion as an option. If you choose a product 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 the magnetic recording of information on a hard drive isn't actually digital. It is more of a waveform. In simple terms, the procedure involves nulling out the known data and reading around the edges of what's left.
An encryption algorithm is like a black box. Dump a document, image, or other file into it, and you get back what sounds 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 depended on Advanced Encryption Standard (AES) as a standard, and all the products gathered here service AES. Even those that support other calculations tend to recommend using AES.
If you are an encryption expert, you may want another algorithm, Blowfish, perhaps, or even the Soviet government's GOST. For the typical consumer, however, AES is just fine.
Passwords are important, and you must keep them secret, 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 a key exchange, tattoo it on your foreheadwhatever you like. Another is personal, and should be carefully guarded. If I want to send you a key document, I simply encrypt it with your public key.
Simple! .
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Using this program in reverse, you can create a digital signature that proves your document came from you and hasn't been modified. How Exactly To encrypt it with your private key. The fact your public key decrypts it is all of the evidence you need. PKI service is less common than support for traditional symmetric algorithms. .
If you want to talk Clicking Here about a file with someone and your encryption tool 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 complimentary, decryption-only tool.