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Using a VPN is a great way to shield 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 shot'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 needed to hire hackers to get into the phone.
Why wouldn't Apple help Because the moment a back door or similar hack exists, it becomes a goal, a decoration for the bad guys. It will flow sooner or later. In a discussion 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 bad guys can't get in either. .
Back in the day, if you wanted to maintain 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 type of product simply processes files and folders, turning them into impenetrable encrypted versions of themselves. The other creates a virtual disc that, when open, behaves like any other drive on your system. When you lock the digital drive, each of the documents that you put into it's completely inaccessible. .
Similar to the digital drive solution, a few goods store your encrypted information in the cloud. This approach requires extreme care, 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 to use encryption. If you are not sure, take advantage of this 30-day free trial offered by each of those products to have a feel for the different options.
Once you copy a file into secure storage, or create an encrypted version of it, you definitely need to wipe out the unencrypted original. Just deleting it isn't sufficient, even in the event that you bypass the Recycle Bin, because the data still exists on disk, and data retrieval utilities can often return back. .
Some encryption products avoid this problem by encrypting the document in place, literally overwriting it on disc using an encrypted version. It's more common, though, to provide safe deletion as an option. If you choose something that lacks this 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 recovery functions because the magnetic recording of data on a hard drive isn't actually digital. It is more of a waveform. In simple terms, the process 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 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 settled on Advanced Encryption Standard (AES) as a standard, and all the products accumulated here support AES. Even those that support other calculations tend to recommend using AES.
If you're an encryption specialist, you might prefer another algorithm, Blowfish, possibly, or even the Soviet government's GOST. For the typical 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, register it in a key exchange, tattoo it on your foreheadwhatever you prefer. Another is personal, and needs to be carefully 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 make a digital signature that shows that your document came from you and hasn't been modified. How Exactly To encrypt it with your private key. The fact that your public key decrypts it is all the evidence you need. PKI support is less common than service 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 enable creation of a self-decrypting executable file. You could also find that the recipient can use a free, decryption-only tool.