User authentication method and apparatus

US5668876A · kind A · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Johan Falk · Järfälla, SE
• Bjorn Jonsson · Järfälla, SE

Key dates

• Filing date: Jun 24, 1994
• Grant date: Sep 16, 1997
• Expiry date: Jun 24, 2014

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2209/80
• WIPO field: IT methods for management
• WIPO sector: Electrical engineering

Abstract

Authorization for a user to use a service is provided by a modified pager which calculates a unique response code to a transmitted challenge code based on the challenge code, an input personal identification number, and an internal key. The response code is input to a simple terminal, such as a telephone and if the unique response code is acceptable, the user may access the desired service, such as cashless transactions or long distance phone service.