Patent · US Active

Secure card terminal using keypad scanning sequence determined by card

US8196815B2 · kind B2 · utility

0Cited by
7References
15Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 28, 2004
Grant dateJun 12, 2012
Priority date—
Expiry dateDec 4, 2027

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG06F2221/2153
  • WIPO fieldControl
  • WIPO sectorInstruments

Abstract

To provide alphanumeric data, such as a PIN code, to a smart card (2) a terminal (1) is used which is capable of communicating with the smart card. The terminal comprises a keypad (4) for entering the alphanumeric data and an associated keypad matrix (5) for producing key signals, which the keypad matrix (5) is scanned for any pressed keys using a scanning sequence so as to produce key signals. To securely enter the data without the risk of the terminal intercepting them it is proposed that said scanning sequence is determined by the smart card (2). In this way, the terminal has no knowledge of the actual keys pressed and the secrecy of the alphanumeric data is ensured.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.