Cryptography – Key management – Having particular key generator
Patent
1994-11-10
1996-12-31
Cain, David C.
Cryptography
Key management
Having particular key generator
380 48, 370911, 370442, 370248, H04L 900
Patent
active
055902014
ABSTRACT:
In a managed repeater having an address learn capability wherein receipt at a particular port of a data packet having a received source address different from a stored source address associated with the particular port replaces the stored source address with the received source address, a source address locking circuit includes an address learn circuit associated with the particular port, for replacing the stored source address with the received source address when the stored source address does not match the received source address, and an address lock register for the particular port, coupled to the address learn circuit, for storing a bit value to disable the address learn circuit from replacing the stored source address with the received source address. This managed repeater provides improved security in a network having source address updating by allowing an administrator to disable the source address update for a particular port in the managed repeater. Each address lock register is externally programmable, and the administrator is able to program time windows to disable source address updating for a particular port. The administrator may program each address lock register independently to prevent the stored source address associated with each port from being updated. The managed repeater allows the administrator to determine on a per port basis whether the managed repeater's address learning capability should be enabled or disabled for a programmable time window.
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Advanced Micro Devices , Inc.
Cain David C.
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