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Using a VPN is a great way to shield your internet traffic when you're traveling, but it's not a solution for encrypting your regional files. .
When the FBI needed information from the San Bernardino shot'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 employ hackers to get into the phone.
Why wouldn't Apple help Because the moment a back door or similar hack exists, it will become a goal, a decoration for the bad guys. It'll leak sooner or later. In a talk 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 key 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 methods in encryption utilities parallel with these options.
One type of product simply processes files and folders, turning them into impenetrable encrypted versions of these. Another creates a virtual disk that, when open, acts 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 information in the cloud. This approach demands 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 really depends on how you plan to use encryption. If you are not sure, take advantage of the 30-day free trial provided by each of those products to get a sense of the different options.
After you copy a file into protected storage, or create an encrypted version of it, then you absolutely need to wipe out the unencrypted original. Just deleting it isn't sufficient, even if you skip the Recycle Bin, since the data still exists on disc, and data recovery utilities can often return back. .
Some encryption products avoid this problem by encrypting the document in place, 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 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 retrieval functions because the magnetic recording of information on a hard drive isn't actually digital. It's 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, picture, or other document into it, and you get back what sounds like gibberish. Run that gibberish back through 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 merchandise accumulated here service AES. Even the ones that support other algorithms tend to recommend using AES.
If you are an encryption specialist, you may prefer another algorithm, Blowfish, perhaps, or the Soviet government's GOST. For the average consumer, 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 discuss it with anyone, enroll it in an integral exchange, tattoo it on your foreheadwhatever you like. The other is private, and should be closely 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 system in reverse, you can make an electronic signature which proves your document came from you and hasn't been modified. How Just 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 service for websites traditional symmetric algorithms. .
If you want to talk about a file with someone and your encryption tool doesn't support PKI, there are other options for sharing. Many products enable creation of a self-decrypting executable file. You may also find that the recipient can use a free, decryption-only tool.