"Intel has recently added support for monotonic counters [5] as an optional SGX feature that an enclave developer may use for rollback attack pro- tection, when available. However, the security and per- formance properties of this mechanism are not precisely documented. We performed a detailed analysis of SGX
counters and report our findings in Appendix B.
To summarize, we found out that counter updates take 80-250 ms and reads 60-140 ms. The non-volatile mem- ory used to implement the counter wears out after ap- proximately one million writes, making the counter func- tionality unusable after a couple of days of continuous use. Thus, SGX counters are unsuitable for systems where state updates are frequent and continuous."
"Intel has recently added support for monotonic counters [5] as an optional SGX feature that an enclave developer may use for rollback attack pro- tection, when available. However, the security and per- formance properties of this mechanism are not precisely documented. We performed a detailed analysis of SGX counters and report our findings in Appendix B. To summarize, we found out that counter updates take 80-250 ms and reads 60-140 ms. The non-volatile mem- ory used to implement the counter wears out after ap- proximately one million writes, making the counter func- tionality unusable after a couple of days of continuous use. Thus, SGX counters are unsuitable for systems where state updates are frequent and continuous."
permanently breaks lol