Difference between OSecuritySymmetricKeyAuth and OSystemSymmetricKeyAuth

[arpitdd123]

While going through "https://orientdb.com/docs/3.2.x/security/Security-Config.html?highlight=authentication#osystemsymmetrickeyauth", I came through 2 terminologies of security that orientdb offers for authentication.

1. OSecuritySymmetricKeyAuth
2. OSystemSymmetricKeyAuth

But while going through configuration document, it looks like only "class" is different other wise both have same properties support.

While going through "https://orientdb.com/docs/3.2.x/security/Security-Symmetric-Key-Authentication.html", it does not clearly mentions what is the difference between above two security classes and what to use when.

Can anyone help me to understand,

1. What is the difference between two classes?
2. When to use which security authentication?