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Using a VPN is a great way to protect your internet traffic when you are 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 rear door to get past the encryption. However, 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 Since the moment a rear door or similar hack is different, it will become a goal, a prize for the bad guys. It will leak sooner or later. In a discussion at Black Hat last summer, Apple's Ivan Krstic revealed the company has done something similar in their cryptographic servers.
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Apple can't update thembut the poor guys can't get in either. .
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 approaches in encryption utilities parallel with those options.
One type of product simply procedures files and folders, turning them into impenetrable encrypted versions of themselves. The other creates a virtual disc that, when open, acts like any other drive on your system. When you lock the virtual drive, each the files you put into it's completely inaccessible. .
Similar to the digital drive solution, a few products save your encrypted information in the cloud. This strategy requires 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 really depends on how you plan on using encryption. If you are not sure, take advantage of the 30-day free trial offered by each of those products to get a feel for the different options.
Once you copy a document into protected storage, or create an encrypted version of it, then you definitely need to wipe the unencrypted original. Just deleting it isn't sufficient, even in the event that you skip the Recycle Bin, because the information still exists on disk, and data retrieval utilities can often get it back. .
Some encryption products avoid this issue by encrypting the document in place, literally overwriting it on disc using an encrypted version. It's more common, however, to offer safe 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 works because 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 information and reading around the edges of what is left.
An encryption algorithm is like 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, 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 products accumulated here service AES. Even those that visit our website support other calculations tend to recommend using AES.
If you are an encryption expert, you might prefer another algorithm, Blowfish, perhaps, 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 receive two keys. One is public; you can share it with anyone, enroll it in a key exchange, tattoo it on your foreheadwhatever you like. The other is private, and needs to be carefully 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 an electronic signature that 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 evidence you need. PKI service is less common than support for traditional symmetric algorithms. .
If you want to share a document with someone and your encryption tool 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.