This object sets the bit length of the device's local RSA key pair, ranging from 512 to 2048 bits, with a default of 512. Admins configure this to control the cryptographic strength of the generated host and server keys, trading off stronger security against slower key operations on lower-end hardware. For example, an admin hardening a device's security posture would raise this value to 2048 before regenerating the local RSA key pair.