3 ms·

After further investigation, it seems that Google does have level 3 for the HSM part (similar to Hyper Protect of IBM). Its level 1 for the software components,

by s-xyz 5y ago

After further investigation, it seems that Google does have level 3 for the HSM part (similar to Hyper Protect of IBM). Its level 1 for the software components, which is practically one of the highest possible. The question changes then to why did Google not pursue level 4.