TY - RPRT AU - Hess, Andreas V. AU - Mödersheim, Sebastian A. AU - Brucker, Achim D. PY - 2018 DA - 2018// TI - Stateful Protocol Composition (Extended Version) IS - 2018-03 PB - DTU Compute, Technical University Denmark KW - protocol composition, security protocol, compositionality AB - We prove a parallel compositionality result for protocols with a shared mutable state, i.e., stateful protocols. For protocols satisfying certain compositionality conditions our result shows that analyzing the component protocols in isolation is sufficient to prove security of the more complex composition. Our main contribution is an extension of the compositionality paradigm to stateful protocols where participants main- tain shared databases. We also support declassification of shared secrets. As a final contribution we prove the core of our result in Isabelle/HOL, providing a strong correctness guarantee of our proofs. L1 - https://www.brucker.ch/bibliography/download/2018/hess.ea-tr-stateful-protocol-2018.pdf UR - https://www.brucker.ch/bibliography/abstract/hess.ea-tr-stateful-protocol-2018 LA - USenglish ID - hess.ea:tr-stateful-protocol:2018 ER -