Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2007-06-26
2007-06-26
Zand, Kambiz (Department: 2134)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C380S258000, C380S259000, C380S260000
Reexamination Certificate
active
10349558
ABSTRACT:
An observation unit of an authentication apparatus and an observation unit of an authentication target apparatus observe a radio wave from a common radio star at a common observation time. A sending unit sends information message including information on the observed radio wave, and an information reception unit receives it. An estimation unit estimates a position of the authentication target apparatus based on “the information on the radio wave observed by the observation unit” and “information on the radio wave observed by the observation unit”. A retaining unit pre-retains positions of one or more authentication target apparatus(s). A determination unit checks whether a position of the authentication target apparatus pre-retained in the retaining unit and the estimated position correspond within a predetermined error range, and settles authentication for the information message as a success in a case where the positions correspond.
REFERENCES:
patent: 4170776 (1979-10-01), Frosch et al.
patent: 4463357 (1984-07-01), MacDoran
patent: 4797677 (1989-01-01), MacDoran et al.
patent: 6963973 (2005-11-01), Chapman et al.
patent: 7003113 (2006-02-01), Yanase
Kondo Tetsuro
Takahashi Fujinobu
Umeno Ken
Brook Mitchell P.
Luce Forward Hamilton & Scripps LLP
National Institute of Information and Communications Technology
Tran Tongoc
Zand Kambiz
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