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Using a VPN is a great way to protect your internet traffic when you're traveling, but it is 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. But 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 Since the moment a back door or similar hack exists, it will become a goal, a prize for the poor guys. It will 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 them, but the bad guys can't get in either. .
Back in the day, in the event that you wanted to keep a document secret you can use a cipher to encrypt it and then burn the original. Or you might lock it up in a protected. The two main approaches in encryption utilities parallel those options.
One type of product simply procedures files and folders, turning them into impenetrable encrypted versions of these. Another creates a virtual disk that, when open, behaves like any other drive on your system. When you lock the digital drive, each of the files that you put into it are entirely inaccessible. .
Similar to the digital drive solution, some goods store your encrypted data in the cloud. This strategy requires extreme caution, obviously. Encrypted information in the cloud has a much larger attack surface than encrypted data on your own PC.
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Which is better It actually depends on how you plan on using encryption. If you're not sure, take advantage of this 30-day free trial provided by each one of those products to get a feel for the different options.
Once you copy a file into protected storage, or make an encrypted version of it, you absolutely need to wipe the unencrypted original. Just deleting it isn't sufficient, even if you bypass the Recycle Bin, because the information still exists on disc, and data retrieval utilities can often return back. .
Some encryption products the original source avoid this problem by encrypting the document in location, literally overwriting it on disc with an encrypted version. It is more common, though, to offer safe deletion as an option. If you choose something 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 retrieval works 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 data and reading around the edges of what is left.
An encryption algorithm is like a black box. Dump a document, image, or other document into it, and you get back what sounds like gibberish. Run that gibberish back through the box, with the exact 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 gathered here service AES. Even the ones that support other calculations tend to recommend using AES.
If you're an encryption specialist, you may prefer another algorithm, Blowfish, perhaps, or 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 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. The other is personal, 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 program in reverse, you can create an electronic signature which shows that your document came from you and hasn't been modified. How Just encrypt it with your private key. The simple fact your public key decrypts it's all the evidence you need. PKI support is less common than service for traditional symmetric algorithms. .
If you want to share 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 could also find that the recipient can use a free, decryption-only tool.