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Using a VPN is a terrific way to protect your internet traffic when you're traveling, but it's not a solution for encrypting your regional 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 create one. The FBI needed to employ hackers to get into the phone.
Why wouldn't Apple help Since the moment a back door or comparable hack is different, it will become a target, a prize for the poor guys. It will leak sooner or later. In a talk 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, if you wanted to keep a document secret you can use a cipher to encrypt it and then burn the original. Or you could lock it up in a protected. The two main methods in encryption utilities parallel with these options.
One type of product simply processes files and folders, turning them into impenetrable encrypted versions of these. Another creates a virtual disk that, when open, behaves like any other drive on your system. When you lock the digital drive, each of the documents that you put into it are entirely inaccessible. .
Like the virtual drive solution, some products save your encrypted data in the cloud. This approach requires extreme caution, obviously. Encrypted information in the cloud has a far larger attack surface than encrypted data on your own PC.
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That is better It actually depends on how you plan on using encryption. If you're not sure, take advantage of this 30-day free trial provided by each one of those products he has a good point to have a sense of the different options.
After you copy a document into protected storage, or make an encrypted version of it, you definitely need to wipe out the unencrypted original. Just deleting it isn't sufficient, even if you skip the Recycle Bin, because the data still exists on disk, and data recovery utilities can often return back. .
Some encryption products prevent this problem by encrypting the document in location, literally overwriting it on disc using an encrypted version. It is more common, though, to offer secure deletion as an option. If you choose a product that lacks this feature, you ought to find a free secure deletion tool to use along with it. .
Overwriting information before deletion is sufficient to balk software-based retrieval tools. Hardware-based forensic retrieval functions since the magnetic recording of information on a hard drive isn't actually digital. It is 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 similar to a black box. Dump a document, image, or other file 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 depended on Advanced Encryption Standard (AES) as a standard, and every one of the products accumulated here support AES. Even those that support other calculations tend to recommend using AES.
If you're an encryption specialist, you might want another algorithm, Blowfish, possibly, or even the Soviet government's GOST. For the average 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 get two keys. One is public; you can share it with anyone, register it in an integral exchange, tattoo it on your foreheadwhatever you prefer. Another is personal, and should be closely guarded. If I want to send you a secret document, I simply 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 modified. How Just encrypt it with your private key. The fact your public key decrypts it's all the proof you need. PKI support 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 enable creation of a self-decrypting executable file. You may also find that the recipient can use a free, decryption-only tool.