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Using a VPN is a great way to protect your internet traffic when you are traveling, but it is 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 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 is different, it will become a goal, a prize for the poor guys. It will flow 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 can use a cipher to encrypt it and then burn the original. Or you could lock it up in a safe. The two main approaches in encryption utilities parallel with those options.
One type of product simply processes files and folders, turning them into impenetrable encrypted versions of these. The other creates a virtual disk drive that, when open, acts like any other drive on your system. When you lock the virtual drive, all of the documents you put into it are completely inaccessible. .
Like the virtual drive solution, a few products save your encrypted data in the cloud. This strategy demands extreme care, obviously. Encrypted information in the cloud has a far 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 these products to have a YOURURL.com feel for the different options.
Once you copy a document into protected 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, since the data still exists on disk, and data retrieval utilities can often get it back. .
Some encryption products prevent this problem by encrypting the document 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 a product 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 recovery tools. Hardware-based forensic recovery works because 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'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 through 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 accumulated here service AES. Even those that support other calculations tend to recommend using AES.
If you're an encryption specialist, you might prefer another algorithm, Blowfish, perhaps, or even the Soviet government's GOST. For the typical consumer, however, AES is just fine.
Passwords are important, and you must keep them secret, 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 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 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 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 application doesn't support PKI, there are different options for sharing. Many products allow creation of a self-decrypting executable file. You may also find that the recipient can use a free, decryption-only tool.