Unique-Path Identity Based Encryption With Applications to Strongly Secure Messaging

ePrint Report: Unique-Path Identity Based Encryption With Applications to Strongly Secure Messaging

Paul Rösler, Daniel Slamanig, Christoph Striecks

Hierarchical Identity Based Encryption (HIBE) is a well studied, versatile tool used in many cryptographic protocols. Yet, since the performance of all known HIBE constructions is broadly considered prohibitive, some real-world applications avoid relying on HIBE at the expense of security. A prominent example for this is secure messaging: Strongly secure messaging protocols are provably equivalent to Key-Updatable Key Encapsulation Mechanisms (KU-KEMs; …

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