CAKE: Compatible Authentication and Key Exchange Protocol for a Smart City in 5G Networks

In a smart city, there are different types of entities, such as nature persons, IoT devices, and service providers, which have computational limitations storage limitations. Unfortunately, all the existing authentication key exchange (AKE) protocols designed for either client–server or client–client authentication, including ones cities. this paper, we present idea compatible (CAKE) protocol provides cross-species authentication. We propose first CAKE city that any two valid entities can authenticate with each other create secure session without help third party, while is also no password table public issuing problem. The entity be natural person having biometrics, an device embedded physical unclonable function (PUF), provider. Moreover, extend to anonymous (ACAKE) protocol, persons option protect their privacy. addition, both proposed ACAKE deal revocation define framework security model protocols. Under model, formally prove under elliptic curve Diffie–Hellman (ECCDH) problem, decisional bilinear (DBDH) hash assumptions. Comparisons related conducted demonstrate benefits our Performance analysis experience results show practical in city.