Brothers and Sisters ... I found the solution to the issue I've been harping on. I thought I'd share.

hi @darrenhillconsulting . Can you elaborate little more . I am doing the similar thing . My requirement is i get a token from external url , i encrypt it and store it in a custom record . And need to decrypt it later . Both encryption and decryption are working fine . My concern is generating the guid and storing it securely. As of now to generate a guid i am using another suitelet , i take that guid from there and hardcode it in current suitelet to encrypt/decrypt . My question is generating guid is a one time activity ? and where do we store the guid ?