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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)
PDF
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
Creative Commons Attribution
CC BY
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