Crypto: IBM Pushes Fully Homomorphic Crypto
grarpamp at gmail.com
Tue Apr 6 00:42:02 PDT 2021
US chipmaker AMD advised customers last week to disable a new
performance feature if they plan to use CPUs for sensitive operations,
as this feature is vulnerable to Spectre-like side-channel attacks.
Called Predictive Store Forwarding (PSF), this feature was added to
AMD CPUs part of the company's Zen 3 core architecture, a processor
series dedicated to gaming and high-performance computing, which
launched in November 2020. The feature implements a technique called
speculative execution, which works by running multiple alternative CPU
operations in advance to make results available faster, and then
discarding "predicted" data once deemed unneeded.
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