The document explains how CeDiplomas use digital signatures and encryption to verify authenticity and prevent tampering. A CeDiploma can only be properly viewed using Adobe Reader or Acrobat due to its digital signature. The signature will not appear on tablets or phones with other PDF viewers. Users are advised to check the issuing school's website to independently validate degrees. CeDiplomas are certified by CeCredential Trust and feature a blue ribbon and CeDiploma/CeDiD symbols to confirm their validity.