@Karthik KummeraTo encrypt the storage stream (BLOB) in Pega, you need to select the "Encrypt BLOB" checkbox on the General tab of the class, which ensures that data stored in the BLOB field is encrypted. Additionally, you must configure the Platform Cipher under System Settings > Data Encryption, as it is the recommended and modern encryption method. Simply selecting the "Encrypt BLOB" checkbox is not enough if the encryption method (cipher) has not been activated. The Platform Cipher ensures that encryption is applied correctly across the system. Without activating a cipher, the encryption will not work as expected. Both steps—enabling the "Encrypt BLOB" checkbox and configuring the Platform Cipher—are required for proper encryption of the storage stream ​​​​​​​