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Using a VPN is a terrific 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 rear door to get past the encryption. However, no such back door existed, and Apple refused to make one. The FBI had 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 decoration for the poor guys. It'll flow sooner or later. In a talk at Black Hat last 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, in the event that you wanted to maintain a document secret you can use a cipher to encrypt it and then burn the original. Or you might lock it up in a safe. The two main methods in encryption utilities parallel these options.
One sort of product simply processes files and folders, turning them into impenetrable encrypted versions of themselves. Another creates a virtual disk drive that, when open, behaves like any other drive on your system. When you lock the digital drive, each the files that you put into it's entirely inaccessible. .
Similar to the virtual drive solution, some products store your encrypted data in the cloud. This approach requires extreme caution, obviously. Encrypted data in the cloud has a much bigger attack surface than encrypted data on your own PC.
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That is better It really depends on how you plan to use encryption. If you are not sure, take advantage of this 30-day free trial provided by each of those products to get a sense of the different options.
After you copy a document into protected storage, or create 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, because the information still exists on disc, and data retrieval utilities can often get it back. .
Some encryption products prevent this problem by encrypting the file in location, literally overwriting it on disc using an encrypted version. It's more common, though, to offer safe deletion as an option. If you select something that lacks this attribute, you should find a free secure deletion tool to use along with it. .
Overwriting information before deletion is sufficient to balk software-based recovery tools. Hardware-based forensic recovery functions since 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 information and reading around the original site borders of what is left.
An encryption algorithm is like a black box. go Dump a document, picture, or other document into it, and you get back what seems like gibberish. Run that gibberish back via the box, with 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 all the products accumulated here service AES. Even the Web Site ones that support other calculations tend to recommend using AES.
If you are an encryption expert, you might prefer another algorithm, Blowfish, possibly, or even the Soviet government's GOST. For the average user, 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, enroll it in a key exchange, tattoo it on your foreheadwhatever you like. The other is private, and should 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 system in reverse, you can create an electronic signature that 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's all the evidence you need. PKI service is less common than support 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 allow creation of a self-decrypting executable file. You could also find that the recipient can use a complimentary, decryption-only tool.