Adobe® AATL Signatures

When verifying digitally signed PDF documents outside the signing service it is very useful that end-users can trust the digital signatures immediately and avoid seeing messages within their PDF Reader that the signature is valid but the signer’s identity is not trusted. To avoid this issue the signing solution needs to support digital certificates from CAs which are registered as part of the Adobe AATL program. Further details on the AATL program can be found here.

AATL signatures are similar to Qualified Signatures in that they are created using keys and high-trust certificates issued to users on secure hardware devices by AATL member CAs licensed by Adobe. SigningHub also supports all AATL certificates: