Advertisement
Published in:
2017 | OriginalPaper | Chapter
8. Multi-User Security
Author : Laila El Aimani
Published in: Verifiable Composition of Signature and Encryption
Publisher: Springer International Publishing
Activate our intelligent search to find suitable subject content or patents.
Select sections of text to find matching patents with Artificial Intelligence. powered by
Select sections of text to find additional relevant content using AI-assisted search. powered by
Abstract
Hitherto, we have considered only a network of two users: signer/confirmer in case of confirmer signatures, and sender/receiver in the signcryption case. This setting is too simplistic to represent reality, where it is customary to have a network of many users that want to exchange signcrypted messages. Also, it is not uncommon in case of confirmer signatures, to have many signers that share the same confirmer, or conversely a signer who has many confirmers. We tackle in this chapter the issue of multi-user security; we first describe the concerns that arise in this extended model, then we formalize these issues in new security definitions, and finally, we give the new analogs of StE, CtEtS, and EtS in the multi-user setting.