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Using a VPN is a great way to shield your internet traffic when you are traveling, but it is not a solution for encrypting your regional 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. But no such back door existed, and Apple refused to make 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 is different, it will become a goal, a prize for the bad guys. It'll flow sooner or later. In a discussion at Black Hat this past summer, Apple's Ivan Krstic disclosed 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, if you wanted to keep a document secret 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 approaches in encryption utilities parallel with those options.
One sort of product simply procedures files and folders, turning them into impenetrable encrypted versions of themselves. Another creates a virtual disc that, when open, acts like any other drive on your system. When you lock the digital drive, each of the documents you put into it's entirely inaccessible. .
Like the virtual drive solution, a few products save your encrypted information in the cloud. This approach requires extreme caution, obviously. Encrypted data in the cloud has a far bigger 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 the 30-day free trial provided by each one of these products to get a feel for the different options.
Once you copy a document into secure storage, or create an encrypted version of it, then you absolutely need to wipe the unencrypted original. Just deleting it isn't sufficient, even in the event that you skip the Recycle Bin, since the data still exists on disk, and data recovery utilities can often get it back. .
Some encryption products prevent this issue by encrypting the document in location, literally overwriting it on disc using an encrypted version. It's more common, though, to offer secure 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 recovery works because 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 data and reading around the edges of what's left.
An Continue encryption algorithm is like a black box. Dump a document, image, or other file into it, and you get back what seems 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 of the merchandise 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 average consumer, 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 like. The other is private, and should be carefully guarded. If I want to send you a secret document, I simply encrypt it with your public key.
Simple! .
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Using this system in reverse, you can create an electronic signature that shows that your document came from you and hasn't been altered. How Just encrypt it with your private key. The fact your public key decrypts it's all the proof you need. PKI service is less common than service for traditional symmetric algorithms. .
If you want to talk about a file with someone and your encryption tool doesn't support PKI, there are different 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.