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Using a VPN is a terrific way to protect your internet traffic when you are 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 for a back door to get past the encryption. However, 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 target, a prize for the poor guys. It will leak sooner or later. In a discussion 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 thembut the bad guys can't get in either. .
Back in the day, if you wanted to keep 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 methods in encryption utilities parallel these options.
One type of product simply processes files and folders, turning them into impenetrable encrypted versions of themselves. The other creates a virtual disk drive that, when open, behaves like any other drive on your system. When you lock the digital drive, all the documents you put into it are entirely inaccessible. .
Like the virtual drive solution, some products save your encrypted data in the cloud. This approach requires extreme caution, obviously. Encrypted data in the cloud has a far larger attack surface than encrypted data on your own PC.
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That 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 one of those 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. Just deleting it isn't sufficient, even in the event that you skip the Recycle Bin, because the data still exists on disk, and data retrieval utilities can often get it back. .
Some encryption products prevent this issue by encrypting the file in place, literally overwriting it on disk using an encrypted version. It is more common, though, to provide secure 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 information before deletion is sufficient to balk software-based retrieval tools. Hardware-based forensic recovery works since 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 information and reading around the edges of what is left.
An these details 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 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 products accumulated here service AES. Even those that support other calculations tend to recommend using AES.
If you're an encryption specialist, you might want another algorithm, Blowfish, possibly, or the Soviet government's GOST. 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 get two keys. One is public; you can share it with anyone, enroll it in a key exchange, tattoo it on your foreheadwhatever you prefer. Another is personal, and should 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 make a digital signature which 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's all of the evidence you need. PKI support is less common than service for traditional symmetric algorithms. .
If you want to talk about a file with someone and your encryption application doesn't support PKI, there are different options for sharing. Many products allow creation of a Check This Out self-decrypting executable file. You could also find that the recipient can use a free, decryption-only tool.