Which layer includes digital representations of an actor or entity's identity in cyberspace?

The Cyber-Persona Layer is specifically designed to encompass the digital representations of an actor or entity's identity within cyberspace. This layer serves as a mechanism for understanding and managing how identities are portrayed, interacted with, and perceived in digital environments.

At this layer, individual users, organizations, or even algorithms can have their own distinct identities, which may include various attributes such as usernames, profiles, digital avatars, and social media representations. This helps in establishing trust and authenticity in online interactions, as it reflects the individual's or entity’s presence and reputation in the digital realm.

On the contrary, the other layers mentioned focus on different aspects of the cyber environment. The Data Layer pertains to the actual data being processed or stored, while the Infrastructure Layer encompasses the physical and virtual resources that support systems and networks. The Application Layer relates to the software applications and services that run on the infrastructure but does not specifically address identity representations in cyberspace. Therefore, the concept of digital identity is aptly situated within the Cyber-Persona Layer, making it the correct choice.