18.1.3.5. Minimum Length of RSA Keys 
Define the minimum length of RSA keys from the remote entity.
The minimum length of RSA keys can be set in the WBM:
WBM > Configuration > Security > Signaling and Payload Encryption (SPE) > SPE
Security Setup > General SPE Security Parameters > Minimum length of RSA keys
In case the certificates used for SPE are generated with RSA Signature Algorithm
(also known as "RSA certificates"), you must define the minimum length of RSA keys
from the remote entity.