(19)
(11) EP 0 807 733 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.12.2000 Bulletin 2000/49

(43) Date of publication A2:
19.11.1997 Bulletin 1997/47

(21) Application number: 97303313.7

(22) Date of filing: 15.05.1997
(51) International Patent Classification (IPC)7: E05B 49/00
(84) Designated Contracting States:
DE FR GB

(30) Priority: 16.05.1996 JP 12186996
13.09.1996 JP 24355596

(71) Applicant: SONY CORPORATION
Tokyo 141 (JP)

(72) Inventors:
  • Takamatsu, Hiroyuki, Sony Corp. Intell. Prop. Div.
    Tokyo 141 (JP)
  • Harada, Yoshio, Sony Corp. Intell. Prop. Div.
    Tokyo 141 (JP)

(74) Representative: Pilch, Adam John Michael et al
D. YOUNG & CO., 21 New Fetter Lane
London EC4A 1DA
London EC4A 1DA (GB)

   


(54) Identification signal checking apparatus and methods


(57) An identification signal checking apparatus includes an apparatus (1) to be detected having a first wireless transmitting and receiving unit (4) , a first signal processing unit (3) and a first memory unit (5) for storing an identification signal. A detecting apparatus (10) has a second wireless transmitting and receiving unit (11), a second signal processing unit (12), a second memory unit (13) for storing an identification signal, and a random number generating unit (14). When the detecting apparatus (10) receives a response request signal from the apparatus (1) to be detected, the detecting apparatus (10) transmits a random number signal obtained from the random number generating unit (14). When receiving the random number signal, the apparatus (1) to be detected encrypts the identification signal stored in the first memory unit (5) by using the random number signal and transmits the encrypted identification signal to the detecting apparatus (10). The detecting apparatus (10) decrypts the encrypted identification signal and checks whether or not it coincides with the identification signal stored in the second memory unit (13).






Search report