Scan and boundary scan disable mechanism on secure device

Details Scan and boundary scan disable mechanism on secure device Scan and boundary scan disable mechanism on secure device

2007-06-05

2007-06-05

Britt, Cynthia (Department: 2137)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Protection at a particular protocol layer

C726S026000, C726S027000, C714S030000, C714S726000, C714S727000

Reexamination Certificate

active

10325382

ABSTRACT:
A circuit generally comprising a logic module and a security module is disclosed. The logic module may be configured to set a plurality of values to a plurality of predetermined values respectively while in a scan mode. The security module may be configured to (i) disable a scan capability of the values while in a non-lowest security mode of at least three security modes and (ii) enabling the scan capability while in a lowest security mode of the security modes.

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