EP 0253885 A4 19910320 - SOLID STATE KEY FOR CONTROLLING ACCESS TO COMPUTER SYSTEMS AND TO COMPUTER SOFTWARE AND/OR FOR SECURE COMMUNICATIONS
Title (en)
SOLID STATE KEY FOR CONTROLLING ACCESS TO COMPUTER SYSTEMS AND TO COMPUTER SOFTWARE AND/OR FOR SECURE COMMUNICATIONS
Publication
Application
Priority
US 81364785 A 19851226
Abstract (en)
[origin: WO8703977A1] A semiconductor device that functions as a key (12) to control access to a computer (34) or a software program resident in a computer or provides for secure communications. The device (64) executes an algorithm that combines a root and a seed to produce a password. The password is input to the computer (34). The computer (34) uses an equivalent algorithm to produce a password within the computer (34). Comparison or other methods are employed to allow access to the computer (34) or computer program or to allow for secure communications. The computer (34) can be coded to produce on a video display (18) thereof a time-space stimulus pattern which can be received by sensors (28a-28d) of the key. Alternatively, a keypad (700) can be employed to input the stimulus output from the computer (34, 68) into the access key (12). Further the present system allows for secure communications using algorithms between different computers and between distant locations.
IPC 1-7
IPC 8 full level
G06F 1/00 (2006.01); G06F 21/34 (2013.01)
CPC (source: EP)
G06F 21/34 (2013.01); G06F 2221/2103 (2013.01)
Citation (search report)
- [A] GB 2154344 A 19850904 - NAT RES DEV
- [A] WO 8503785 A1 19850829 - GORDIAN SYSTEMS INC [US]
- [A] US 4369332 A 19830118 - CAMPBELL JR CARL M
- [A] US 4471163 A 19840911 - DONALD THOMAS C [US], et al
- See references of WO 8703977A1
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 8703977 A1 19870702; EP 0253885 A1 19880127; EP 0253885 A4 19910320
DOCDB simple family (application)
US 8602784 W 19861222; EP 87901275 A 19861222