The HomomorphicEncryption.org community has been developing security guidelines for FHE since the First Standards Meeting in 2017. A security white paper was adopted by the community in 2018 (shortly after the Third Standards Meeting) and has since been used for configuring many FHE libraries and applications. This page provides links to the original and updated security guidelines, work factor estimation tools for lattice attacks, and current projects of the Security working group.
Community Papers
- “Homomorphic Encryption Standard” is the security document that was adopted by HomomorphicEncryption.org FHE security experts at the Third Standards Meeting in 2018. It was first published here. Then, it was published at Cryptology ePrint at https://ia.cr/2019/939. Finally, it appeared as book chapter at https://doi.org/10.1007/978-3-030-77287-1_2. The tables from this document have been widely used by FHE libraries and applications.
- “Security Guidelines for Implementing Homomorphic Encryption” provides more up-to-date security tables and also includes examples of functional parameters for all common FHE schemes. The paper was published in IACR Communications in Cryptology Vol. 1, No. 4 and is accessible at https://doi.org/10.62056/anxra69p1.
Work factor estimation tools
- Lattice estimator
- TII Tool
Current projects of security working group
- Sparse secret repository