For systems running Solaris 9 or earlier, encryption is based on the package SUNWcry.
Note the following conditions for systems that run Solaris 9:
SNMP encryption on both the Sun Management Center server and agent hosts depends on the SUNWcry package, which contains the /usr/lib/libcrypt_d.so encryption library. You must install this package separately.
SNMP encryption is not supported on Sun Management Center 3.5 and earlier servers and agents even if SUNWcry is installed.
SNMP encryption support is automatically configured during agent or server setup if the SUNWcry package is detected.