The official PGP user's guide
Proxy signatures for delegating signing operation
CCS '96 Proceedings of the 3rd ACM conference on Computer and communications security
A new approach for delegation using hierarchical delegation tokens
Proceedings of the IFIP TC6/TC11 international conference on Communications and multimedia security II
Communications of the ACM
Accountable-subgroup multisignatures: extended abstract
CCS '01 Proceedings of the 8th ACM conference on Computer and Communications Security
ICICS '97 Proceedings of the First International Conference on Information and Communication Security
Efficient Identification and Signatures for Smart Cards
CRYPTO '89 Proceedings of the 9th Annual International Cryptology Conference on Advances in Cryptology
Delegation of Responsibility (Transcript of Discussion)
Proceedings of the 6th International Workshop on Security Protocols
Supporting E.cient Authorization in Delegation with Supervision
ICPADS '05 Proceedings of the 11th International Conference on Parallel and Distributed Systems - Workshops - Volume 02
A novel efficient (t,n) threshold proxy signature scheme
Information Sciences: an International Journal
Aggregate and verifiably encrypted signatures from bilinear maps
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
An analysis of proxy signatures: is a secure channel necessary?
CT-RSA'03 Proceedings of the 2003 RSA conference on The cryptographers' track
Signcryption from randomness recoverable public key encryption
Information Sciences: an International Journal
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Delegation certificates (e.g. SPKI) support the decentralized management of access rights in organizations without the need for a centralized server to mediate every delegation operation. However, it does not allow the access rights to be delegated in a flexible way. For instance, a user cannot be granted the authorization to perform delegation of permission without granting himself/herself the authorization to exercise the associated permission at the same time. In this paper, we propose an improved delegation model, where the various users in a delegation chain may perform supervision on the delegate to exercise the delegated permission. We describe the way to support the model using SPKI as an example. Also, we describe how to support efficient authorization in delegation with supervision using proxy signature techniques.