Oops, I did it again revisited: another look at reusing one-time signatures

ePrint Report: Oops, I did it again revisited: another look at reusing one-time signatures

Scott Fluhrer

In "Oops, I did it again" - Security of One-Time Signatures under Two-Message Attacks, Bruinderink and Hülsing analyzed the effect of key reuse for several one time signature systems.
When they analyzed the Winternitz system, they assumed certain probabilities were independent when they weren't, leading to invalid conclusions.
This paper does a more correct characterization of the Winternitz scheme, and while their ultimate conclusion …

attacks effect eprint report key message report reuse security signature signatures systems under