Re: National products
When I read
Serious countries (USA, UK, Germany, France) do not use foreign algorithms for high-security needs. They mandatorily have to use national products and standards (from the algorithm to its implementation),” he added.
I wondered whether they use these mysterious other algorithms because they are
1. Stronger, or
2. They have a known flaw in them allowing the country's spy agency to be able to track and decrypt information being leaked to the enemy.
There are valid reasons for both.