Do you know what is encryption? In our point of view, it should be a good stuff to protect your important documents. However, it is a double-edged sword. It really happened, the application in dark side.
RSA is a public key encryption. The encryption algorithm can be divided into two main stream, private key and public key. Private key encryption algorithm is using only one key to encrypt and decrypt the text, sometimes called single key. In opposite, public key encryption uses one key to encrypt the text and one key to decrypt. RSA is a strong encryption algorithm, the size of the key determine how robust the encryption is. Some experts believe that it needs more than a century to decrypt the message encrypted with 1024 bits key!
Back to the topic, a very strong encryption is really a double-edged sword. Why I say so? Because there is a virus Gpcode.ak, it is an improved version of Gpcode. What it does is very simple, use RSA to encrypt your documents and files with 1024 bits key. Then ask you to buy their decryptor. It is obvious a crime, a kind of kidnapping, and asking for your ransom!!
It is a very creative idea to use encryption in such a way, although it is a crime. Nothing is always staying in good side.
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