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Using a VPN is a terrific way to shield your internet traffic when you're 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 for a back door to get past the encryption. But 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 will become a goal, a decoration for the bad guys. It'll 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 thembut the bad guys can't get in either. .
Back in the day, if you wanted to maintain a document key you could use a cipher to encrypt it and then burn the original. Or you might lock it up in a safe. The two main methods in encryption utilities parallel these options.
One sort of product simply processes files and folders, turning them into impenetrable encrypted versions of themselves. The other creates a virtual disk that, when open, acts like any other drive on your system. When you lock the virtual drive, all the documents you put into it's completely inaccessible. .
Like the digital drive solution, some goods save your encrypted data in the cloud. This strategy requires 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 on using encryption. If you're not sure, take advantage of this 30-day free trial offered by each one of those products to get a feel for the different options.
After you copy a file into protected storage, or create an encrypted version of it, then you absolutely need to wipe out the unencrypted original. Just deleting it isn't sufficient, even if you bypass the Recycle Bin, because the data still exists on disc, and data recovery utilities can often get it back. .
Some encryption products prevent this problem by encrypting the document in location, literally overwriting it on disk using an encrypted version. It is more common, however, to provide safe deletion as an option. If you select something that lacks this feature, you should find a free secure click to investigate 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 process 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, image, or other file into it, and you get back what sounds like gibberish. Run that gibberish back through the box, using the same password, and you this post 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 support AES. Even those that support other algorithms tend to recommend using AES.
If you're 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, enroll it in an integral exchange, tattoo it on your foreheadwhatever you like. The other is personal, and needs to 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 system in reverse, you can make a digital signature that proves 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 is all the proof 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 different options for sharing. Many products allow creation of a self-decrypting executable file. You may also find that the recipient can use a free, decryption-only tool.