Cryptographic protocol for privacy-preserving integration of HAZOPs in modular process plants

Research output: Contribution to journalResearch articleContributedpeer-review


Information which is contained in Hazard & Operability (HAZOP) studies is highly sensitive since it can reveal the vulnerabilities of a system and potential ways in which to bypass safeguards. Through the design of systems involving collaboration along a value chain, at some point this information is shared between several parties. In this paper, we propose a methodology for the secure exchange of safety information whilst preserving sensitive information for the application of modular Hazard & Operability (HAZOP) studies. We use homomorphic encryption in a workflow for the sharing of information between plant owners and operators as well as module vendors. We apply encryption to the risks from different modular HAZOPs (mHAZOPs), and combine and compare them without disclosing the risk level. Our contribution is a privacy-preserving protocol for mHAZOP comparison during the integration of modular process and equipment. We provide an exemplary implementation of the protocol and demonstrate the protocol's privacy and correctness.


Original languageEnglish
Article number108295
Journal Computers & chemical engineering : an international journal of computer applications in chemical engineering
Publication statusPublished - May 2023

External IDs

Scopus 85160529129
Mendeley b6990ad1-2b13-3782-b3eb-97a5181f87e2
ORCID /0000-0001-5165-4459/work/142248292


Research priority areas of TU Dresden

Subject groups, research areas, subject areas according to Destatis


  • Confidentiality, Homomorphic encryption, Modular HAZOP, Privacy-preserving computation

Library keywords