Overview
Decrypting attachments using a script
Decryption
You can encrypt using,
sysAttachment.changeEncryptionContext(attachmentGR.getValue("table_name"), attachmentGR.getValue("table_sys_id"), attachmentGR.sys_id, encryptionId);
and you can decrypt by passing a empty encryptionId
Example
sysAttachment.changeEncryptionContext(attachmentGR.getValue("table_name"), attachmentGR.getValue("table_sys_id"), attachmentGR.sys_id, "");