CryptoDB
Benedikt Schmidt
Publications
Year
Venue
Title
2019
JOFC
Automated Analysis of Cryptographic Assumptions in Generic Group Models
Abstract
We initiate the study of principled, automated methods for analyzing hardness assumptions in generic group models, following the approach of symbolic cryptography. We start by defining a broad class of generic and symbolic group models for different settings—symmetric or asymmetric (leveled) k -linear groups—and by proving “computational soundness” theorems for the symbolic models. Based on this result, we formulate a very general master theorem that formally relates the hardness of a (possibly interactive) assumption in these models to solving problems in polynomial algebra. Then, we systematically analyze these problems. We identify different classes of assumptions and obtain decidability and undecidability results. Next, we develop and implement automated procedures for verifying the conditions of master theorems, and thus the validity of hardness assumptions in generic group models. The concrete outcome of this work is an automated tool which takes as input the statement of an assumption and outputs either a proof of its generic hardness or shows an algebraic attack against the assumption.
2016
EUROCRYPT
2015
PKC
Program Committees
- Eurocrypt 2016
Coauthors
- Miguel Ambrona (2)
- Gilles Barthe (6)
- Juan Manuel Crespo (1)
- Edvard Fagerholm (3)
- Dario Fiore (3)
- Yassine Lakhnech (1)
- John C. Mitchell (2)
- Andre Scedrov (3)
- Benedikt Schmidt (6)
- Mehdi Tibouchi (1)