Ncr Corporation

Lee W Hoevel

Michael R Hilley

William J Kass

Manning I Rose

A system for ascertaining identity of a customer based on a single card carried by the customer. The card bears a machine-readable code, which is transmitted to a database at a remote location. The database locates a record associated with the code, which contains one or more account numbers. Associated with each account number is a Personal Identification Number, PIN. (It is possible that all PINs are identical.) The customer selects an account number, and is asked for a PIN. If the PIN given by the customer matches that of the account number, the customer is concluded to be the valid owner of the account, and a transaction is allowed to proceed.

Access card for multiple accounts

A method and system of maintaining coherency for a data block transferred from a main memory to a cache memory. The data transfer is recorded in a tag register in the main memory. An overwrite of the data block is detected by comparing main memory data writes with the recorded transfer. The cache memory is only notified in the event an overwrite is detected. An invalid flag is then set in the cache.

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Clemson, SC, United States of America

Lee W Hoevel