Joanna B Yoder

US Patent:

52875199, Feb 15, 1994

Filed:

Sep 17, 1992

Appl. No.:

7/947019

Inventors:

Richard A. Dayan - Boca Raton FL
Kimthanh D. Le - Boynton Beach FL
Matthew T. Mittelstedt - Lantana FL
Palmer E. Newman - Boca Raton FL
Dave L. Randall - Pompano Beach FL
Lisa A. Ruotolo - Lake Worth FL
JoAnna B. Yoder - Delray Beach FL

Assignee:

International Business Machines Corp. - Armonk NY

International Classification:

G06F 1314
G06F 704

US Classification:

395700

Abstract:

A method and medialess personal computer system workstation (or LAN station as herein defined) adaptable for securing the system against attack on a secured network with which the LAN station is associated. A flag bit is set in system memory during a power on self test to indicate whether access may be had to certain security features of the system, and a procedure is described by which access to a network stored configuration setting program may be gained in order to install, change or remove a password used for securing the LAN station while avoiding passing the critical password data through the network.

US Patent:

53881567, Feb 7, 1995

Filed:

Feb 26, 1992

Appl. No.:

7/840965

Inventors:

John W. Blackledge - Boca Raton FL
Grant L. Clarke - Boca Raton FL
Richard A. Dayan - Boca Raton FL
Kimthanh D. Le - Boynton Beach FL
Patrick E. McCourt - Delray Beach FL
Matthew T. Mittelstedt - Delray Beach FL
Dennis L. Moeller - Boca Raton FL
Palmer E. Newman - Boca Raton FL
David L. Randall - Pompano Beach FL
JoAnna B. Yoder - Delray Beach FL

Assignee:

International Business Machines Corp. - Armonk NY

International Classification:

H04L 900

US Classification:

380 4

Abstract:

This invention relates to personal computer systems and, more particularly, to such a system having security features enabling control over access to data retained in such a system. In particular, a personal computer system in accordance with this invention has a normally closed enclosure, at least one erasable memory element for selective activation to active and inactive states and for receiving and storing a privileged access password when in the active state, an option switch operatively connected with the erasable memory element for setting the erasable memory element to the active and inactive states, a tamper detection switch operatively connected with the erasable memory element for detecting opening of the enclosure and for invalidating any privileged access password stored in the erasable memory element in response to any switching of the tamper switch, and a system processor operatively connected with the erasable memory element for controlling access to at least certain levels of data stored within the system by distinguishing between the active and inactive states of the memory element and between entry and non-entry of any stored privileged access password. In the presently preferred form of the invention, two non-volatile erasable memory elements are provided, one an EEPROM and the other battery backed CMOS RAM.