I keep reading the term "reversibly encrypted" and that confuses me because I thought that is kind of the point of encryption, that it can be decrypted.
I googled it, as a good student, and found this encyclopedia entry.
irreversible encryption A cryptographic process that transforms data deterministically to a form from which the original data cannot be recovered, even by those who have full knowledge of the method of encryption. The process may be used to protect stored passwords in a system where the password offered is first encrypted before it is matched against the stored encrypted password. Illegal access to the stored password therefore does not permit access to the system.
This brings up the question for me: What is the difference between irreversibly encrypted and hashed passwords? Or is that just another way of naming a hashed password that no one uses?