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Using a VPN is a terrific way to protect your internet traffic when you're 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 for a back door to get past the encryption. However, no such back door existed, and Apple refused to make one. The FBI needed to employ hackers to get into the phone.
Why wouldn't Apple help Because the moment a rear door or comparable hack is different, it will become a target, a decoration for the poor guys. It'll leak sooner or later. In a discussion at Black Hat last summer, Apple's Ivan Krstic revealed 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 keep a document key you can 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 with these options.
One sort of product simply procedures 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 digital drive, all the files you put into it are entirely inaccessible. .
Like the digital drive solution, some products store your encrypted data in the cloud. This strategy requires extreme care, obviously. Encrypted information in the cloud has a far bigger attack surface than encrypted data on your own PC.
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That is better It actually depends on how you plan to use encryption. If you're not sure, take advantage of this 30-day free trial provided by each of these products to get a feel for the different options.
After you copy a document into secure storage, or make an encrypted version of it, then you absolutely need to wipe the unencrypted original. Just deleting it isn't sufficient, even if you bypass the Recycle Bin, since the data still exists on disc, and data retrieval utilities can often get it back. .
Some encryption products prevent this problem by encrypting the document in place, literally overwriting it on disk using an encrypted version. It's more common, though, to offer 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 recovery tools. Hardware-based forensic retrieval 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 procedure involves nulling out the known information and reading around the borders of what's left.
An encryption algorithm is similar to a black box. Dump a document, image, or other document into it, and you get back what seems 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 all of the products accumulated here service AES. Even those that support other algorithms tend to recommend using AES.
If you are an encryption specialist, you might want another algorithm, Blowfish, perhaps, or the Soviet government's GOST. For the typical consumer, however, AES is just fine.
Passwords are official website important, and you must keep them secret, 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 an integral exchange, tattoo it on your foreheadwhatever you prefer. The other is private, and should be closely 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 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 fact that your public key decrypts it's all of the proof you need. PKI service is less common than support for traditional symmetric algorithms. .
If you want to share a document with someone and your encryption tool doesn't support PKI, there are other 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.