Patent · US Active

Fast ciphering key search for WLAN receivers

US8811618B2 · kind B2 · utility

0Cited by

12References

49Claims

0Family size

Assignee

GlobalFoundries Inc. · KY

Inventors

Ingo Kuehn · Wettingen, CH
Uwe Eckhardt · Dresden, DE
Axel Wachtler · Meißen, DE
Falk Tischer · Riesa, DE

Key dates

Filing date	Jul 26, 2004
Grant date	Aug 19, 2014
Priority date	—
Expiry date	Mar 9, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04W84/12
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A ciphering key management technique for use in a WLAN receiver is provided where a hash table is stored that has a first and a second table portion. The first table portion stores transmitter address data and the second table portion stores at least one cipher key. It is determined whether a transmitter address matches transmitter address data in the first table portion, and if so, a corresponding cipher key stored in the second table portion is determined for use in decrypting the received data. The hash table technique allows for a fast search for the correct cipher key. Embodiments are described that allow for dynamically adding and removing keys without blocking the search.

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