Abstract
Authentication and key management for applications (AKMA) is the new cellular-network-based delegated authentication system of 5G. In this article, we explain what a delegated authentication system is and how it relates to concepts like federated identity management. We also explain why a cellular-network-based delegated authentication system is more secure than a password-based delegated authentication system. We present a concise description of how AKMA works and compare its functionalities to other cellular-network-based delegated authentication systems. Finally, we describe privacy issues of AKMA and point to cryptographic techniques that could help in resolving these issues.
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