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CactiLab / 2022-ectf-UB-Cacti-design

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Why three aes keys? #1

Open zzm7000 opened 2 years ago

zzm7000 commented 2 years ago

Can you explain what is the point of using three different aes keys?

Tomal-kuet commented 2 years ago

There are three different flags for version, firmware, configuration data. So we thought using three different keys will better. If one key is compromised we don't expose the other two.

zzm7000 commented 2 years ago

But sounds like if they can compromise one key, they can also compromise the other two. How they are protected differently?

Tomal-kuet commented 2 years ago

There are also side-channel attacks, maybe it will be useful? or we can just use one key.