Browse Prior Art Database

Memory Protection in Chip Cards

IP.com Disclosure Number: IPCOM000036605D
Original Publication Date: 1989-Oct-01
Included in the Prior Art Database: 2005-Jan-29

Publishing Venue

IBM

Related People

Authors:
Scherzer, H [+details]

Abstract

Presently, a plastic (credit) card for financial transactions may contain a microprocessor and a memory. The memory typically consists of a ROM with the operating system, a RAM acting as a working memory, and an additional EPROM (erasable programmable memory) or an EEPROM (electrically erasable programmable memory) for data to be loaded later. The EEPROM data may also be an application program that is loaded at a later stage.