One interesting benefit of using the UltraSPARC T2 hardware accelerators is that many traditional side-channel attacks are impossible. For instance, many cache-based attacks are not feasible and a number of timing attacks are similarly thwarted (arguably these constitute the most practical categories of side-channel attack).
While this immunity can be achieved in software, there is typically a significant associated performance penalty.
[N.B., Solaris not exposed to "concurrency vulnerabilities in system call wrappers"]
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