Perform the following steps:
(1) Stop the BD Server with the bd.[bat|sh] utility at [BD_Server_dir]\bin path.
Example command for Linux: ./bd.sh monitor stop
(2) From the same bin directory, run the bd_encryption_util utility.
For Linux: [BD_server_dir]\bin>.\bd_encryption_util.sh
For Windows: [BD_server_dir]\bin>bd_encryption_util.bat
(3) Select option1 "Keystore/Truststore password property" and then option 2 "Change Keystore/Truststore password in property file and keystore files".
(4) Enter y, then provide the new Keystore and Truststore password.
(5) To verify the password in Keystore/TrustStore files, select option 3.
If the password have been changed successfully, it will show as "Current Keystore/Truststore password is valid".
(6) Start the BD Server with command: ./bd.sh monitor start
Screenshot for reference: