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Using a VPN is a terrific way to shield your internet traffic when you're 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 back door to get past the encryption. But 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 back door or similar hack exists, it becomes a target, a prize for the poor guys. It'll flow sooner or later. In a talk at Black Hat this past summer, Apple's Ivan Krstic disclosed 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 could 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 these options.
One type of product simply procedures files and folders, turning them into impenetrable encrypted versions of themselves. The other creates a virtual disc drive that, when open, acts like any other drive on your system. When you lock the digital drive, all of the files that you put into it's completely inaccessible. .
Similar to the virtual drive solution, some goods store your encrypted information in the cloud. This approach requires extreme care, obviously. Encrypted information in the cloud has a far larger attack surface than encrypted data on your own PC.
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Which 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 file into secure storage, or make an encrypted version of it, then you absolutely need to wipe the unencrypted original. Just deleting it isn't sufficient, even in the event that you bypass the Recycle Bin, because the data still exists on disk, and data retrieval utilities can often get it back. .
Some encryption products avoid this issue by encrypting the document in location, literally overwriting it on disc with an encrypted version. It's more common, though, to offer secure deletion as an option. If you choose a product 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 retrieval tools. Hardware-based forensic recovery functions since the magnetic recording of data 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 edges of what is left.
An sites encryption algorithm is similar to a black box. Dump a document, picture, or other document into it, and you get back what seems 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 those that support other algorithms tend to recommend using AES.
If you are an encryption specialist, you may prefer another algorithm, Blowfish, perhaps, or even the Soviet government's GOST. For the typical 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 get two keys. One is public; you can share it with anyone, enroll it in an integral exchange, tattoo it on your foreheadwhatever you prefer. The other is private, and should be closely 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 system in reverse, you can create an electronic signature that proves 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 of the evidence 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 other options for sharing. Many products allow creation of a self-decrypting executable file. You may also find that the recipient can use a complimentary, decryption-only tool.