SafeBet: Secure, Simple, and Fast Speculative Execution. (arXiv:2306.07785v1 [cs.AR])

Spectre attacks exploit microprocessor speculative execution to read and
transmit forbidden data outside the attacker's trust domain and sandbox. Recent
hardware schemes allow potentially-unsafe speculative accesses but prevent the
secret's transmission by delaying most access-dependent instructions even in
the predominantly-common, no-attack case, which incurs performance loss and
hardware complexity. Instead, we propose SafeBet which allows only, and does
not delay most, safe accesses, achieving both security and high performance.
SafeBet is based on the key observation that speculatively accessing a …

access attack attacks case complexity data domain exploit fast forbidden hardware loss microprocessor performance sandbox secret simple spectre speculative execution transmission trust