Password Nonce
The current path is:
storage.redis.password_nonce
This is a required random string used when hashing password material for Redis-side logic. It must be long, random, and must not contain spaces.
Example
storage:
redis:
password_nonce: "replace-with-a-long-random-string"
Related setting:
storage.redis.encryption_secret
Do not keep either value in plaintext dumps unless you explicitly use -P.