| A common means of modern encryption is a one-way system in which encryption is easy but decryption is computationally impractical. |
| More recent viruses and blended threats also extract passwords, decryption keys and logged keystrokes. |
| This in turn allows for the decryption of the individual string keys, which finally allow for decryption of individual usernames and passwords. |
| There are even better encryption techniques that are asymmetric, that is, the keys used for encryption and decryption are not the same. |
| For example, in this case, it is easier to try to factor the modulus N than to perform an exhaustive key search on all possible decryption keys. |
| The password is then used to generate the symmetric encryption key for the RSA private key, which allows for its decryption. |
