Originally posted here by Unleashed
In computer memory technology, RAS (row address strobe) is a signal sent to a dynamic random access memory (DRAM) that tells it that an associated address is a row address. A data bit in DRAM is stored in a cell located by the intersection of a column address and a row address. A column address strobe (CAS) signal is used to validate the column address.

cached passwords are stored in registry. like dial-up passwords
Quoting the source would be a good idea.