Design of cryptographic protocols, i.e. ways of using algorithms (primitives) to achieve one or more security goals like integrity, confidentiality, authenticity (maybe together with non-security-related goals). If you ask about a specific protocol, tag with its name instead (or additionally, if ...
As far as I know, most of ID-based authenticated key exchange (AKE) protocols are CK-secure, and there are few of them which are eCK-secure. All of the eCK-secure ID-based AKE protocols use the ...