Which expression is correct?

What I want to express is:

background:

When the CPU is processing data, multiple processes may use one CPU at the same time. In order to prevent the data of one process from being speculated by another person. Some people design the secure cache (the cache is a storage component inside the CPU. The data in the cache can be quickly retrieved by the CPU. However, it takes a long time for the CPU to retrieve data that is not in the cache. Whenever the CPU uses data, it puts the data in the cache. This saves time when CPU use it again in the future. A process can measure the time it takes to access data A. If the time is short, then it can infer that someone else has accessed data A. If the access time is long, then it can infer that someone else has not accessed data A.

cache hit refers to the accessed data in the cache.
cache miss refers to the accessed data not in the cache.

Getting all cache accesses to be hits is ideal, and this can be done
using other on-chip storage [22], rather than a cache.

Constant time using a cache can also be approached by “preloading” all the
security-critical data into the cache, so that all accesses to them
are cache hit

One drastic approach is to disable the cache for security-critical
accesses [8] so that all accesses to security-critical data miss in
the cache.

The above three sentences are the ideas of three secure cache design.

I want to summarize them. The following two sentences are the summary I wrote.
May I ask which sentence can accurately express my meaning. Or both sentences are unreasonable?
Thanks.

The previous secure cache design stores critical data (or
directly prohibits access to critical data) by preloading or using
other on-chip storage, so attackers can only observe cache hits (or
misses) when reusing these data.

The previous secure cache designs store critical data by
preloading or using other on-chip storage
(or directly prohibiting access to critical data)
so that attackers can only observe cache
hits (or misses) when reusing these data.