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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 regional files. .
When the FBI needed information from the San Bernardino shot's iPhone, they asked Apple to get a back door to get beyond the encryption. But no such back door existed, and Apple refused to create one. The FBI had to employ hackers to get into the phone.
Why wouldn't Apple help Because the moment a back door or comparable hack is different, it becomes a target, a decoration for the bad guys. It will leak 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. .
Each of the products in this roundup explicitly say they have no back door, and that's as it should be. It does mean that in the event you encrypt an essential document and then forget the encryption password, you have lost it for good.
Back in the day, in the event that you wanted to maintain a document secret you could use a cipher to encrypt it and then burn the original. Or you could lock it up in a safe. The two main methods in encryption utilities parallel with these options.
One type of product simply procedures files and folders, turning them into impenetrable encrypted versions of these. 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 documents that you put into it are entirely inaccessible. .
Like the virtual drive solution, some goods store your encrypted information in the cloud. This approach requires extreme caution, obviously. Encrypted information in the cloud has a much larger attack surface than encrypted data on your own PC.
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Which is better It really 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 have a sense of the different options.
Once you copy a file into secure storage, or make an encrypted version of it, then you definitely need to wipe out the unencrypted original. Simply deleting it isn't sufficient, even if you skip the Recycle Bin, since the data still exists on disk, and data recovery utilities can often get it back. .
Some encryption products prevent this problem by encrypting the document in location, literally overwriting it on disk with an encrypted version. It's more common, though, to provide secure deletion as an option. If you choose 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 retrieval tools. Hardware-based forensic retrieval 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 borders 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, using 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 every one the products accumulated here service AES. Even those that support other calculations tend to recommend using AES.
If you are an encryption expert, you may prefer another algorithm, Blowfish, perhaps, or the Soviet government's GOST. For the typical consumer, however, AES is just fine.
Passwords are important, and you must keep them secret, redirected here 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, register it in a key exchange, tattoo it on your foreheadwhatever you like. Another 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 make a digital signature which proves your document came from you and hasn't been altered. How Just encrypt it with your private key. The fact your public key decrypts it is all of the proof you need. PKI service is less common than service for traditional symmetric algorithms. .
If you want to share a file 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 could also find that the recipient can use a complimentary, decryption-only tool.