Systems and methods are provided for use in appending log entries to a data structure. One exemplary method includes receiving, at a communication device, a log entry from a terminal and signing the log entry with a private key of a key pair specific to the communication device. The method also includes transmitting the signed log entry to an identity provider (IDP) and receiving, by the communication device, from the IDP, a signed, encrypted log entry. The method further includes verifying, by the communication device, a signature of the signed, encrypted log entry based on a public key associated with a key pair specific to the IDP and then appending the encrypted log entry to a digital identity included in the communication device.