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Guaranteeing that information processed in computing systems remains confidential is vital for many software applications. To this end, language-based security mechanisms enforce fine-grained access control policies for program variables to prevent secret information from leaking through unauthorized access. However, approaches for language-based security by information flow control mostly work post-hoc, classifying programs into whether they comply with information flow policies or not after the program has been constructed. Means for constructing programs that satisfy given information flow control policies are still missing. Following the correctness-by-construction approach, we propose a development method for specifying information flow policies first and constructing programs satisfying these policies subsequently. We replace functional pre- and postcondition specifications with confidentiality properties and define rules to derive new confidentiality specifications for each refining program construct. We discuss possible extensions including initial ideas for tool support. Applying correctness-by-construction techniques to confidentiality properties constitutes a first step towards security-by-construction.
The authors would like to thank the anonymous reviewers for valuable comments and suggestions for improvements and future work.
- 3.Amtoft, T., Bandhakavi, S., Banerjee, A.: A logic for information flow in object-oriented programs. In: POPL, pp. 91–102 (2006)Google Scholar
- 4.Amtoft, T., Banerjee, A.: Information flow analysis in logical form. In: SAS, pp. 100–115 (2004)Google Scholar
- 5.Amtoft, T., Hatcliff, J., Rodríguez, E., Robby, Hoag, J., Greve, D.A.: Specification and checking of software contracts for conditional information flow. In: Cuellar, J., Maibaum, T. (eds.): FM 2008. LNCS, vol. 5014, pp. 229–245. Springer, Boston (2008)Google Scholar
- 7.Arzt, S., et al.: Flowdroid: precise context, flow, field, object-sensitive and lifecycle-aware taint analysis for android apps. In: PLDI, pp. 259–269 (2014)Google Scholar
- 8.Chapman, R.: Correctness by construction: a manifesto for high integrity software. In: Proceedings of the 10th Australian Workshop on Safety Critical Systems and Software, SCS 2005, vol. 55, pp. 43–46 (2006)Google Scholar
- 15.Méry, D., Monahan, R.: Transforming event B models into verified C# implementations. In: First International Workshop on Verification and Program Transformation, VPT 2013, Saint Petersburg, Russia, pp. 57–73, 12–13 July 2013 (2013)Google Scholar
- 21.Watson, B.W., Kourie, D.G., Schaefer, I., Cleophas, L.: Correctness-by-construction and post-hoc verification: a marriage of convenience? In: Margaria, T., Steffen, B. (eds.) ISoLA 2016. LNCS, vol. 9952, pp. 730–748. Springer, Cham (2016). https://doi.org/10.1007/978-3-319-47166-2_52CrossRefGoogle Scholar
- 22.Zdancewic, S., Myers, A.C.: Robust declassification. In: 14th IEEE Computer Security Foundations Workshop (CSFW-14 2001), 11–13 June 2001, pp. 15–23, Cape Breton, Nova Scotia, Canada (2001)Google Scholar