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Using a VPN is a great way to shield 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 shooter's iPhone, they asked Apple to get a back door to get beyond 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 exists, it becomes a goal, a decoration for the poor guys. It'll leak sooner or later. In a talk 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 thembut 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 approaches in encryption utilities parallel those options.
One sort of product simply procedures files and folders, turning them into impenetrable encrypted versions of these. Another creates a virtual disk drive that, when open, acts like any other drive on your system. When you lock the virtual drive, each of the documents you put into it are entirely inaccessible. .
Like the digital drive solution, some goods save 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 are not sure, take advantage of the 30-day free trial offered by each one of these products to have a feel for the different options.
Once you copy a file like this into secure storage, or make an encrypted version of it, you absolutely need to wipe out the unencrypted original. Just deleting it isn't sufficient, even in the event that you skip the Recycle Bin, because the information still exists on disc, and data recovery utilities can often get it back. .
Some encryption products prevent this issue by encrypting the file in location, literally overwriting it on disk with an encrypted version. It content is more common, however, to provide secure deletion as an option. If you choose something that lacks this attribute, 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 retrieval functions because the magnetic recording of data on a hard drive isn't actually digital. It's more of a waveform. In simple terms, the procedure involves nulling out the known information and reading around the edges 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 sounds like gibberish. Run that gibberish back via the box, using 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 the products accumulated here support AES. Even those that support other calculations tend to recommend using AES.
If you are an encryption expert, you may want another algorithm, Blowfish, possibly, or the Soviet government's GOST. For the typical 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 discuss it with anyone, register it in a key exchange, tattoo it on your foreheadwhatever you like. The other is private, and needs to be carefully guarded. If I want to send you a secret go 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 shows that your document came from you and hasn't been altered. How Exactly To encrypt it with your private key. The fact that your public key decrypts it is all of the evidence you need. PKI service is less common than service for traditional symmetric algorithms. .
If you want to share a document with someone and your encryption tool doesn't support PKI, there are other options for sharing. Many products allow creation of a self-decrypting executable file. You could also find that the recipient can use a free, decryption-only tool.