Single-Use Delegatable Signatures Based on Smart Contracts. (arXiv:2210.02826v1 [cs.CR])

Delegation of cryptographic signing rights has found many application in the
literature and the real world. However, despite very advanced functionalities
and specific use cases, existing solutions share the natural limitation that
the number of usages of these signing rights cannot be efficiently limited, but
users can at most be disincentivized to abuse their rights.

In this paper, we suggest a solution to this problem based on blockchains. We
let a user define a smart contract defining delegated signing rights, …

signatures single smart smart contracts