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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 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 Because the moment a rear door or similar hack is different, it becomes a goal, a prize for the poor guys. It will leak sooner or later. In a talk at Black Hat last summer, Apple's Ivan Krstic revealed 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. .
All of the products in this roundup explicitly say that they have no rear door, and that's as it should be. It will 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 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 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. Another creates a virtual disc drive that, when open, acts like any other drive on your system. When you lock the virtual drive, all the files that you put into it's entirely inaccessible. .
Like the digital drive solution, some products save your encrypted information in the cloud. This approach requires extreme care, obviously. Encrypted data in the cloud has a much bigger attack surface than encrypted data on your own PC.
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Which is better It click for source really depends on how you plan on using encryption. If you're not sure, take advantage of this 30-day free trial provided by each of those products to have a feel for the different options.
Once you copy a document into secure storage, or create an encrypted version of it, then you absolutely need to wipe the unencrypted original. Simply deleting it isn't sufficient, even if you skip the Recycle Bin, because the data still exists on disc, and data retrieval utilities can often get it back. .
Some encryption products prevent this issue by encrypting the file in place, literally overwriting it on disc using an encrypted version. It's more common, though, to provide safe 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 web software-based retrieval tools. Hardware-based forensic retrieval works because the magnetic recording of data on a hard drive isn't actually digital. It's more of a waveform. In simple terms, the procedure involves nulling out the known information and reading around the borders of what's left.
An encryption algorithm is like a black box. Dump a document, image, or other file into it, and you get back what sounds like gibberish. Run that gibberish back via the box, using the 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 all the products accumulated here support AES. Even the ones that support other calculations tend to recommend using AES.
If you're an encryption specialist, you may want another algorithm, Blowfish, perhaps, or the Soviet government's GOST. For the average user, 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 share it with anyone, register it in a key 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 just encrypt it with your public key.
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Using this system in reverse, you can create a digital signature which 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's all of the proof you need. PKI support is less common than service for traditional symmetric algorithms. .
If you want to share a document with someone and your encryption tool doesn't support PKI, there are other options for sharing. Many products enable creation of a self-decrypting executable file. You could also this contact form find that the recipient can use a free, decryption-only tool.