Ideally neither C nor C++ should be used when security matters.
For me, choosing the language is not enough. It's the tooling that goes far beyond the language that is important for safety and quality of compiler and runtime. C has very mature tooling options. So does ADA.
https://www.absint.com/astree/index.htm
Abstract Interpretation in a Nutshell https://www.di.ens.fr/~cousot/AI/IntroAbsInt.html
Proceses that outside high integrity computing no one is willing to make themselves go through without legal requirements and liability.
Most of it because during 1980's it was cheaper to advocate for C plus certification than pay for Ada compilers and developers.
Slightly off topic, but it's great to see "crypto" to mean cryptography, helping users to keep their data secure, and not as so often these days those silly cryptocurrency crime tokens.
