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Paper 2013/408
Highly Controlled, Fine-grained Delegation of Signing Capabilities
Michael Backes and Sebastian Meiser and Dominique Schröder
Abstract
Delegation of signing rights is a central problem in security. Whereas delegating by giving power of attorney is well studied and digitally realized via delegatable anonymous credentials, directly delegating signing possibilities without the need for an external logic, can be done via malleable signature schemes. However, the existing schemes do not allow for privacy preserving, fine-grained malleability and they do not allow for a controlled way of further delegating the malleability. We bridge this gap by introducing delegatable functional signatures (DFS).
Metadata
- Available format(s)
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- Functional signaturesdelegatable functional signaturesmalleable signature schemes
- Contact author(s)
- ds @ ca cs uni-saarland de
- History
- 2013-10-10: revised
- 2013-06-25: received
- See all versions
- Short URL
- https://ia.cr/2013/408
- License
-
CC BY