%0 Conference Paper
%B 7th International Conference on Cryptology in India - Progress in Cryptology - INDOCRYPT
%D 2006
%T Secure Cryptographic Workflow in the Standard Model
%A Manuel Bernardo Barbosa
%A Pooya Farshim
%C Kolkata, India
%I Springer
%P 379-393
%S Lecture Notes in Computer Science
%V 4329
%X <p>Following the work of Al-Riyami et al. we define the notion of key encapsulation mechanism supporting cryptographic workflow (WF-KEM) and prove a KEM-DEM composition theorem which extends the notion of hybrid encryption to cryptographic workflow. We then generically construct a WF-KEM from an identity-based encryption (IBE) scheme and a secret sharing scheme. Chosen ciphertext security is achieved using one-time signatures. Adding a public-key encryption scheme we are able to modify the construction to obtain escrow-freeness. We prove all our constructions secure in the standard model.</p>
%8 December
%@ 3-540-49767-6
%> https://haslab.uminho.pt/sites/default/files/mbb/files/450.pdf