Get password from a known key-iv-combination (RijndaelManaged in C#)

Question

Is it possible to "calculate" a valid password string when the Key and the IV (as strings) for a RijndaelManaged-Key are known?

Answer 1

No it should not be possible. It depends which key derivation function you use, but usually password and salt are repeatably hashed with MD5 or SHA1 so virtually impossible.