Abstract: The historical evolution of digital identity reveals its fundamental nature as a digital symbol formed through the technological conversion of real-world identity information into verifiable code.This virtual identity,while existing in cyberspace,maintains the capacity for accurate projection and interaction within the physical world.Within the parallel architecture of physical and virtual realms enabled by digital technology,digital identity interactions generate dual relationships:digital connections in virtual space and social relationships in physical reality.Crucially,digital relationships remain confined to interactions between virtual identities and do not inherently constitute social relationships in the physical world.Law's regulatory scope traditionally encompasses only social relationships between physical persons,excluding purely virtual interactions among digital identities.However,when digital identity behaviors produce tangible effects in the physical world through accurate projection,the resulting digital relationships become susceptible to transformation into physically grounded social relationships.Consequently,legal regulation should focus not on digital relationships within virtual space,but specifically on the social relationships arising from the projection of digital symbols onto physical entities.This distinction forms the essential logical foundation for developing coherent legal frameworks for digital identity.

Key words: digital identity, parallel worlds, physical projection, legal regulation