Attack on Trace Buffer: A Study on Observability versus Security in Post-Silicon Debug

The standardization of AES symmetric cipher was gained by National Institute of Standard and Technology in the widespread acceptance of various protocols with an intense study from crypto analysis theoretically. It remains more vulnerable from the physical point of implementation. Till now, the attacks are made on AES through differential power analysis, fault injection, cache access timings and scan-chains. Nowadays, trace buffers are extensively used in industries for debugging. A source of information is leaked from the trace buffer so that a countermeasure is taken in this paper in the name of trace buffer attack. This type of attack is having the capability to recover keys from various implementations on AES. The result shows the comprehensive process of an attack on trace buffer and also shows how to avoid such type of attacks.