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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 local 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. However, 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 Because the moment a back door or similar hack exists, it becomes a goal, a decoration for the bad guys. It'll flow 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 thembut the bad guys can't get in either. .
Back in the day, if you wanted to keep a document key 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 methods in encryption utilities parallel these options.
One type of product simply processes 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 the files you put into it are completely inaccessible. .
Similar to the digital drive solution, a few products save your encrypted information in the cloud. This approach requires extreme care, obviously. Encrypted data in the cloud has a far larger 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 the 30-day free trial provided by each of these products to have a feel for the different options.
Once you copy a document into protected storage, or create an encrypted version of it, you absolutely need to wipe out the unencrypted original. Simply deleting it isn't sufficient, even in the event that you skip the Recycle Bin, because the data still exists on disk, and data recovery utilities can often get it back. .
Some encryption products avoid this problem by encrypting the file in place, literally overwriting it on disc using an encrypted version. It is more common, however, to provide secure deletion as an option. If you choose something that lacks this feature, 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 recovery functions since 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 data and reading around the borders of what's 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 visit 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 every one of the products accumulated here service AES. Even those that support other calculations tend to recommend using AES.
If you're an encryption expert, you may prefer another algorithm, Blowfish, perhaps, or the Soviet government's GOST. For the typical 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 share it with anyone, register it in an integral exchange, tattoo it on your foreheadwhatever you like. The other is private, and should be carefully guarded. If I want to send you a key 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 altered. How Exactly To 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 support for traditional symmetric algorithms. .
If you want to share a document 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 may also find that the recipient can use a free, decryption-only tool.