3 ms·
Which would be more difficult, reading the secret at some point before the memory was cleared, or reading it _after_ the memory was cleared, but _before_ the ca
by floodyberry- 7y ago
Which would be more difficult, reading the secret at some point before the memory was cleared, or reading it _after_ the memory was cleared, but _before_ the cache was overwritten?
- rurban 7y agoThe secrets stay in the cache much longer, and are rarely evicted to the heap at all.
- floodyberry- 7y agoCryptographic operations can take hundreds of thousands of cycles during which the values can be freely read. The cache will stay stale after the values have been cleared for _longer_ than that?
- rurban 7y agoAt least one of the 3 caches will stay much longer, yes. Esp. the L3. Throwing a tantrum because of 50 cycles for the mb is laughable. They should call it fast crypto, but not secure crypto.