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Using a VPN is a great 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 for a back 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 Because the moment a back door or similar hack is different, it becomes a goal, a prize for the poor guys. It'll flow sooner or later. In a discussion at Black Hat last 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 bad guys can't get in either. .
Back in the day, in the event that you wanted to maintain a document key you could use a cipher to encrypt it and then burn the original. Or you could lock it up in a protected. The two main approaches in encryption utilities parallel those options.
One type of product simply processes files and folders, turning them into impenetrable encrypted versions of these. Another creates a virtual disc that, when open, behaves like any other drive on your system. When you lock the digital drive, each of the files you put into it's completely inaccessible. .
Like the digital drive solution, a few products store your encrypted data in the cloud. This approach requires extreme care, obviously. Encrypted information in the cloud has a much bigger attack surface than encrypted data on your own PC.
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That is better It really depends on how you plan to use encryption. If you are not sure, take advantage of this 30-day free trial provided by each one of these products to have a feel for the different options.
After you copy a document into secure storage, or make an encrypted version of it, you absolutely 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 retrieval utilities can often get it back. .
Some encryption products avoid this issue 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 a product 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 recovery tools. Hardware-based forensic retrieval works 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 edges of what is left.
An encryption algorithm is like a black box. Dump a document, image, or other document into it, and you get back what sounds like gibberish. Run helpful resources that gibberish back via the box, with the exact 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 gathered here service AES. Even the ones that support other calculations tend to recommend using AES.
If you are an encryption expert, you may want another algorithm, Blowfish, possibly, or even the Soviet government's GOST. For the average user, however, AES is just fine.
Passwords are important, and you must keep them confidential, right Well, not when you use Public Key Infrastructure (PKI) cryptography.
With PKI, you receive two keys. One is public; you can share it with anyone, register it in an integral exchange, my company tattoo it on your foreheadwhatever you prefer. Another 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 create a digital signature that shows that 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's all of the evidence you need. PKI support is less common than support for traditional symmetric algorithms. .
If you want to talk about 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 complimentary, decryption-only tool.