With WebSphere MQ Advanced message Security, it is possible to use a single certificate to authenticate the connection and to sign the messages, or separate certificates can be used for each purpose.

使用WebSphere MQ Advanced Message Security，可以使用单个证书对连接进行身份验证并签署消息，也可以针对不同的目的使用单独的证书。

youdao

Audit requirements are satisfied by including with every electronic document a separate certificate of completion and a legally binding audit trail with the identity of the signer, a time stamp, and location information.

FORBES: eSignature Serves The Public Sector