The document discusses the Learning Management System (LMS) and Public Key Infrastructure (PKI) digital signature. The LMS allows teachers to conduct online classes and assign activities to learners. It works with the DepEd Commons to provide open educational resources. The PKI secures communications between individuals and government agencies to safely and efficiently deliver government services digitally. A digital certificate issued by a Certificate Authority contains a user's personal information to authenticate them digitally and ensure confidentiality and integrity of information transmitted online.