Key based Encryption/Decryption in ABAP

Hi Experts,

I have a requirement where a string needs to be encrypted based on key/pwd and later needs to decrypted with the same key/pwd in ABAP.

Below is the highlights of requirement.

1. Key/pwd has to be generated and stored for encryption/decryption.
2. String needs to be encrypted with this key/pwd in ABAP.
3. The encrypted string needs to be decrypted with the same key/pwd in ABAP.

Please suggest on how to achieve this in ABAP

Thanks,

Vijay