Cache-Partitioning scheme to protect against cache-side channel attacks

[yashika verma]

Hello,

Could you please help in solving below query, 

I want to know, is there any relation between page colouring scheme of Sanctum and cache-partitioning(i.e. way-partitioning) scheme implemented in Keystone?

Regards,

Yashika

[Dayeol Lee]

Hello Yashika,

There is no relation between Sanctum and Keystone in that part.

Cache coloring partitions the cache sets (horizontal) where Keystone partitions the cache ways (vertical).

Keystone's partitioning is closer to DAWG (https://eprint.iacr.org/2018/418.pdf) which uses Intel's CAT to do way partitioning.

In general, most parts in Keystone are designed/built independently. 

The only part that Keystone derives from Sanctum is the secure boot.

Thanks!

Dayeol

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