Systems and methods for cross-domain authentication in edge-enabled vehicle-to-everything (v2x) services

A method comprising:

• receiving, by a service provider (SP) from a user, a request to subscribe to a service, the request comprising:
• an identifier (ID) of the user;
• a parameter {tilde over (Y)}v, wherein {tilde over (Y)} is a component of a public key of an identity server (IS), v is a random variable generated according to
• v
• ←
• $
• ℤ
• p
• ,
• and $ denotes that a value is randomly chosen from a group;
• an identity credential of the user;
• a random variable a generated according to
• a
• ←
• $
• ℤ
• p
• ;
• and
• an indication of the service;
• and
• generating, by the SP, a service credential, based on the identity credential of the user and the indication of the service.

A method comprising:

• receiving, by an identity server (IS), a request message requesting to generate an anonymous credential for a user, the request message indicating:
• an identifier (ID) of the user;
• a signature, generated based on an identity credential of the user and is related to a service indicated via a service si;
• and
• a parameter Ti, wherein Ti=ati, wherein a and ti are random values generated respectively according to:
• t
• i
• ←
• $
• ℤ
• p
• ,
• and
• ⁢
• a
• ←
• $
• ℤ
• p
• ,
• $ denotes that a value is randomly chosen from a group;
• verifying, by the IS, validity of the signature;
• and
• generating, by the IS, the anonymous credential for the user based on the signature.