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Computer Security Resource Center

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    Presentations 2021
Presentation

Lower bounds on lattice sieving and information set decoding

June 7, 2021

Presenters

Elena Kirshanova - Immanuel Kant Baltic Federal University

Description

In two of the main areas of post-quantum cryptography, based on lattices and codes, nearest neighbor techniques have been used to speed up state-of-the-art cryptanalytic algorithms, and to obtain the lowest asymptotic cost estimates to date [May{Ozerov, Eurocrypt'15; Becker{Ducas{Gama{Laarhoven, SODA'16]. These upper bounds are useful for assessing the security of cryptosystems against known attacks, but to guarantee long-term security one would like to have closely matching lower bounds, showing that improvements on the algorithmic side will not drastically reduce the security in the future. As existing lower bounds from the nearest neighbor literature do not apply to the nearest neighbor problems appearing in this context, one might wonder whether further speedups to these cryptanalytic algorithms can still be found by only improving the nearest neighbor subroutines.

Event Details

Location

    
                        

                


                

        
 Related Topics


            

                Security and Privacy:
                    post-quantum cryptography            

    


        

        






    


            Created June 07, 2021, Updated June 10, 2021