Need to convert Triple DES3 to AES.
Top Secret uses hardware encryption by default and uses software only if hardware encryption is not successful. The Top Secret control option AESENC controls what encryption level is used.
See the following link for the steps to convert from DES to AES 128E:
Convert Triple-DES to 128-Bit Enhanced AES Encryption for Passwords/Password Phrases
See the following link for the steps to implement AES 256 encryption:
Implement 256-Bit AES Encryption for Passwords/Password Phrases