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Using a VPN is a terrific way to protect 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 shot'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 hire hackers to get into the phone.
Why wouldn't Apple help Since the moment a rear door or comparable hack is different, it becomes a target, a decoration for the poor guys. It'll leak 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 bad guys can't get in either. .
Back in the day, if you wanted to keep 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 with these options.
One sort of product simply processes files and folders, turning them into impenetrable encrypted versions of these. The other creates a virtual disk that, when open, behaves like any other drive on your system. When you lock the virtual drive, each the documents that you put into it are entirely inaccessible. .
Like the virtual drive solution, a few products save your encrypted information in the cloud. This strategy requires extreme caution, obviously. Encrypted data in the cloud has a much 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 offered by each one of those products to get a sense of the different options.
Once you copy a file into protected storage, or make an encrypted version of it, you definitely need to wipe the unencrypted original. Simply deleting it isn't sufficient, even in the event that you bypass the Recycle Bin, since the information 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's more common, however, to provide safe deletion as an option. If you select something that lacks this attribute, 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 recovery functions since the magnetic recording of data on a hard drive isn't actually digital. It is more of a waveform. In simple terms, the process involves nulling out the known information and reading around the edges of what is left.
An encryption algorithm is like a black box. Dump a document, picture, or other file into it, and you get back what seems like gibberish. Run that gibberish back via the box, with the same password, and you get back the original.
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The advice 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 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 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 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 create a digital signature which proves your document came from you and hasn't been modified. How Just encrypt it with your private key. The simple fact that your public key decrypts it's all of the proof you need. PKI support is less check these guys out common than support for traditional symmetric algorithms. .
If you want to share a file with someone and your encryption application doesn't support PKI, there are other options for sharing. Many products enable creation of a self-decrypting executable file. You may also find that the recipient can use a complimentary, decryption-only tool.