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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 shooter'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 Since the moment a back door or comparable hack exists, it becomes a goal, a decoration for the bad guys. It'll 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 poor guys can't get in either. .

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All of the products in this roundup explicitly say that they have no rear door, and that's as it ought to be. It does mean that in the event you encrypt an essential document and then forget that the encryption password, you have lost it for good.

Back in the day, if you wanted to maintain 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 approaches in encryption utilities parallel with these options.

One sort of product simply procedures files and folders, turning them into impenetrable encrypted versions of themselves. Another creates a virtual disk drive that, when open, behaves like any other drive on your system. When you lock the virtual drive, all of the files that you put into it are entirely inaccessible. .

Like the virtual drive solution, some goods store your encrypted data in the cloud. This strategy demands extreme care, obviously. Encrypted data 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 are not sure, take advantage of the 30-day free trial provided by each of those products to get a feel for the different options.

Once you copy a file into protected storage, or create an encrypted version of it, then you absolutely need to wipe out the unencrypted original. Just deleting it isn't sufficient, even if you skip the Recycle Bin, because the information still exists on disk, and data recovery utilities can often get it back. .

Some encryption products avoid this issue by encrypting the document in place, literally overwriting it on disc with an encrypted version. It is more common, though, to provide secure deletion as an option. If you choose something that lacks this feature, 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 recovery functions because the magnetic recording of information on a hard drive isn't actually digital. It's more of a waveform. In simple terms, the procedure 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 seems like gibberish. Run that gibberish back through the box, look what i found 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 of the merchandise accumulated here support AES. Even the ones that support other algorithms tend to recommend using AES.

If you're an encryption expert, you might prefer another algorithm, Blowfish, possibly, or even the Soviet government's GOST. For the typical user, however, AES is just fine.

Passwords are important, and you have to keep them confidential, 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, enroll it in an integral exchange, tattoo it on your foreheadwhatever you prefer. Another is private, and needs to be closely guarded. If I want to send you a key document, I simply encrypt it with your public key.

Simple! .

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Using this program in reverse, you can create a digital signature that shows that 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 the evidence you need. PKI service is less common than service for traditional symmetric algorithms. .

If you want to share a file with someone the original source 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.

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