After configuring the Encryption for Jira app, you need to encrypt attachments.
Encrypting Attachments After the Configuration
When getting started, we recommend that you encrypt all attachments in your Jira instance.
After generating and saving your keys, a message asks you to encrypt all your existing attachments. If you click Encrypt Now, a process is launched in the background to encrypt all attachments.
If you select Encrypt Later, no attachments are encrypted until you go to the Configuration page and apply a security scheme.
The outcome of encryption is that the attachments will no longer be readable by accessing them directly from the server file system.
Configuring the Security Scheme
You also need to configure the security scheme for encrypting attachments.
The Project Level Encryption for Attachments settings can be found under Manage Apps in the Jira Administration menu and selecting Configuration from the Encryption for Jira section of the left sidebar.
By default, all attachments will be encrypted. If this is your desired behaviour, disable the Security Schemes toggle.
This way, all existing attachments, and the new ones, will be encrypted.
Select Encrypted Projects
If you want to select only specific project attachments to be encrypted, please enable the Security Schemes toggle and select the required projects.