Puncturable Key Wrapping and Its Applications

ePrint Report: Puncturable Key Wrapping and Its Applications

Matilda Backendal, Felix Günther, Kenneth G. Paterson

We introduce puncturable key wrapping (PKW), a new cryptographic primitive that supports fine-grained forward security properties in symmetric key hierarchies. We develop syntax and security definitions, along with provably secure constructions for PKW from simpler components (AEAD schemes and puncturable PRFs). We show how PKW can be applied in two distinct scenarios. First, we show how to use PKW to achieve forward security for TLS …

applications eprint report key