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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 shot'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 had to employ hackers to get into the phone.
Why wouldn't Apple help Since the moment a rear door or similar hack is different, it becomes a goal, a prize for the poor guys. It will flow sooner or later. In a discussion at Black Hat last 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 poor guys can't get in either. .
Back in the day, in the event that you wanted to maintain a document secret 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 those options.
One sort 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 virtual drive, each of the files that you put into it's completely inaccessible. .
Similar to the digital drive solution, a few products save your encrypted data in the cloud. This approach requires extreme care, obviously. Encrypted information in the cloud has a much 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're not sure, take advantage of this blog here 30-day free trial offered by each one of those products to get a sense of the different options.
After you copy a file into secure storage, or make an encrypted version of it, then you definitely need to wipe out the unencrypted original. Simply deleting it isn't sufficient, even if you skip the Recycle Bin, since the data still exists on disk, and data recovery utilities can often get it back. .
Some encryption products avoid this problem by encrypting the document in location, literally overwriting it on disc using an encrypted version. It's more common, though, to provide safe deletion as an option. If you choose a product that lacks this attribute, you should find a free secure deletion tool to use along with it. .
Overwriting data before deletion is sufficient to balk software-based recovery tools. Hardware-based forensic retrieval functions since the magnetic recording of data on a hard drive isn't see actually digital. It's more of a waveform. In simple terms, the procedure involves nulling out the known information and reading around the borders of what is left.
An encryption algorithm is similar to a black box. Dump a document, picture, or other file 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 settled on Advanced Encryption Standard (AES) as a standard, and all the products accumulated 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, possibly, or the Soviet government's GOST. For the average user, 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 receive 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 needs to 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 make an electronic signature which proves 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 support for traditional symmetric algorithms. .
If you want to share a document 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 may also find that the recipient can use a free, decryption-only tool.