Cryptographic method using dual encryption keys and a wireless local area network (LAN) system therefor
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United States of America Patent
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Nov 16, 2010
Grant Date -
Jan 8, 2004
app pub date -
Jul 7, 2003
filing date -
Jul 6, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cryptographic method using dual encryption keys and a wireless local area network (LAN) system therefor includes (a) generating a first group key in N wireless terminals forming an ad-hoc group, where N is equal to or greater than two, (b) generating a second group key in a main wireless terminal to perform a key distribution center function among the N wireless terminals, and transmitting the second group key to (N−1) sub wireless terminal, and (c) encoding data using the second group key, and transmitting the encoded data between the N wireless terminals. Data security in a wireless LAN system of an ad-hoc network is increased by creating a first group key having a low frequency of use using a group password, and using a random key generation algorithm to create, distribute, and modify a second group key in a wireless terminal functioning as a key distribution center.
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