Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
1997-12-24
2001-03-06
Malzahn, David H. (Department: 2121)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
C380S028000
Reexamination Certificate
active
06199086
ABSTRACT:
FIELD OF THE INVENTION
The present invention is directed to wireless communication technology where secure communication is achieved using elliptic curve cryptographic techniques, and more particularly to a circuit and method for decompressing a compressed elliptic curve point for further processing.
BACKGROUND OF THE INVENTION
The use of secure communication of information provided by encryption techniques is desirable in wireless communication devices, such as pagers, cellular telephones, etc. In these environments, there is a constant struggle to minimize the amount of information transmitted to control costs and profitability of systems. When the data to be transmitted is encrypted, it is still desirable to minimize the overall amount of data actually transmitted.
Elliptic curve (EC) cryptography has become particularly useful in the field of wireless communication because it is more efficient both in terms of bandwidth and computation time than other industry public key encryption standards, such as RSA. It is desirable to provide a circuit and method for exploiting certain properties of EC cryptography to facilitate the use of this technology in wireless communication devices.
REFERENCES:
patent: 5077793 (1991-12-01), Falk et al.
patent: 5313530 (1994-05-01), Iwamura
patent: 5497423 (1996-03-01), Miyaji
patent: 5627893 (1997-05-01), Demytko
patent: 5737424 (1998-04-01), Elteto et al.
Dworkin James Douglas
Glaser P. Michael
Lambert Robert John
Torla Michael John
Vadekar Ashok
Dulaney Randi L.
Malzahn David H.
Motorola Inc.
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