Security goals and protocol transformations
TOSCA'11 Proceedings of the 2011 international conference on Theory of Security and Applications
Sound security protocol transformations
POST'13 Proceedings of the Second international conference on Principles of Security and Trust
Establishing and preserving protocol security goals
Journal of Computer Security - Foundational Aspects of Security
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A transformation F between protocols associates the messages sent and received by participants in a protocol ${\it\Pi}_1$ with messages sent and received in some ${\it\Pi}_2$. Transformations are useful for modeling protocol design, protocol composition, and the services that protocols provide.A protocol transformation determines a map from partial behaviors ${\mathbb A}_1$ of ${\it\Pi}_1$--which we call "skeletons"--to skeletons $F({\mathbb A}_1)$ of ${\it\Pi}_2$. Good transformations should act as functors, preserving homomorphisms (information-preserving maps) from one ${\it\Pi}_1$-skeleton to another. Thus, if $H:{\mathbb A}_1\mapsto{\mathbb A}_2$ is a homomorphism between ${\it\Pi}_1$-skeletons, then there should be a homomorphism $F(H): F({\mathbb A}_1)\mapsto F({\mathbb A}_2)$ between their images in ${\it\Pi}_2$.We illustrate protocol transformation by examples, and show that our definition ensures that transformations act as functors.