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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 beyond the encryption. However, no such back door existed, and Apple refused to create one. The FBI had to hire hackers to get into the phone.
Why wouldn't Apple help Since the moment a rear door or similar hack exists, it will become a target, a decoration for the bad guys. It will flow sooner or later. In a discussion at Black Hat this past 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 poor guys can't get in either. .
Back in the day, if you wanted to maintain a document secret you can use a cipher to encrypt it and then burn the original. Or you might lock it up in a safe. The two main approaches in encryption utilities parallel with those options.
One type of product simply processes files and folders, turning them into impenetrable encrypted versions of these. The other creates a virtual disc drive 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 are completely inaccessible. .
Similar to the virtual drive solution, some goods save your encrypted data in the cloud. This strategy demands extreme care, obviously. Encrypted data 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 those products to get a feel for the different options.
Once you copy a document 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 skip the Recycle Bin, because 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's more common, however, to provide secure deletion as an option. If you select something that lacks this feature, you ought to find a free secure deletion tool to use along with it. .
Overwriting data before deletion is sufficient to balk software-based retrieval 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 borders of what is left.
An encryption algorithm is like a black box. Dump a document, picture, or other document into it, and you get back what seems like gibberish. Run that gibberish back via 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 all the products gathered here service AES. Even the ones that support other algorithms tend to recommend using AES.
If you are an encryption expert, you might want another algorithm, Blowfish, perhaps, or even the Soviet government's GOST. For the average consumer, however, AES is just fine.
Passwords are important, and you have to 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 discuss it with anyone, register 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 create a digital signature which shows that your document came from you and hasn't been modified. How Exactly To encrypt it with your private key. The fact that special info 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 application 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 complimentary, decryption-only tool.