Apparatus and method of authenticating joint test action...

Information security – Prevention of unauthorized use of data including prevention... – Access control

Reexamination Certificate

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C714S726000, C726S002000, C726S026000

Reexamination Certificate

active

08056142

ABSTRACT:
In an apparatus including a joint test action group (JTAG) authentication device, and a JTAG authentication method using the apparatus, the apparatus includes a joint test action group (JTAG) authentication device, the apparatus comprising a JTAG access circuit that determines whether to access a JTAG-compliant device according to a predetermined protocol that governs the JTAG-compliant device and the apparatus, wherein the JTAG access circuit at least one of inactivates at least one of inner bus lines and inner units and activates the at least one of the inner bus lines and the inner units according to whether the JTAG-compliant device is accessed.

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