Retrieve TT&C master/session keys

# Description

The attacker gains knowledge of a Session or Master Key. In general, there isn't immediate way to uncover this corruption, until it is used to modify the system's behaviour. In case of a suspicious key corruption, the key replacement shall be executed as soon as possible. (Citation: SRC014) (Citation: SRC025) Standard/references: (Citation: SRC014) (Citation: SRC025)