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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 regional files. .

When the FBI needed information from the San Bernardino shooter's iPhone, they asked Apple to get a back door to get past the encryption. However, no such back door existed, and Apple refused to make one. The FBI needed to hire hackers to get into the phone.

Why wouldn't Apple help Because the moment a back door or comparable hack exists, it becomes a goal, a decoration 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 poor guys can't get in either. .

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

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

One sort of product simply processes files and folders, turning them into impenetrable encrypted versions of these. The other creates a virtual disk that, when open, behaves like any other drive on your system. When you lock the virtual drive, each of the documents you put into it are completely inaccessible. .

Like the digital drive solution, a few products save your encrypted information in the cloud. This approach requires extreme caution, obviously. Encrypted data in the cloud has a much 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 this 30-day free trial provided by each one of these products to get a feel go to my site for the different options.

Once you copy a file into secure storage, or make an encrypted version of it, then you definitely need to wipe the unencrypted original. Just deleting it isn't sufficient, even if you skip the Recycle Bin, because the data still exists on disc, and data recovery utilities can often return back. .

Some encryption products prevent this issue by encrypting the document in location, literally overwriting it on disk using an encrypted version. It is more common, however, to offer secure deletion as an option. If you select something that lacks this attribute, you should find a click here now 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 works since the magnetic recording of information 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 edges of what is left.

An encryption algorithm is similar to a black box. Dump a document, picture, or other file into it, and you get back what seems like gibberish. Run that gibberish back via the box, with 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 of the merchandise gathered 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 the Soviet government's GOST. For the average consumer, however, AES is just fine.

Passwords are important, and you have to 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, enroll it in a key exchange, tattoo it on your foreheadwhatever you prefer. Another is personal, and should be carefully guarded. If I want to send you my blog a key document, I simply encrypt it with your public key.

Simple! .

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Using this system in reverse, you can create an electronic signature that proves 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's all of the proof you need. PKI support is less common than service for traditional symmetric algorithms. .

If you want to talk about a file with someone and your encryption application doesn't support PKI, there are different options for sharing. Many products enable creation of a self-decrypting executable file. You may also find that the recipient can use a complimentary, decryption-only tool.