Cryptology ePrint Archive: Report 2001/053

Security Proofs for the RSA-PSS Signature Scheme and Its Variants

Jakob Jonsson

Abstract: We analyze the security of different versions of the adapted RSA-PSS signature scheme, including schemes with variable salt lengths and message recovery. We also examine a variant with Rabin-Williams (RW) as the underlying verification primitive. Our conclusion is that the security of RSA-PSS and RW-PSS in the random oracle model can be tightly related to the hardness of inverting the underlying RSA and RW primitives, at least if the PSS salt length is reasonably large. Our security proofs are based on already existing work by Bellare and Rogaway and by Coron, who examined signature schemes based on the original PSS encoding method.

Category / Keywords: public-key cryptography / digital signatures, factoring, public-key cryptography, RSA

Publication Info: The paper is not published elsewhere.

Date: , last revised 3 Jul 2001

Contact author: jjonsson at rsasecurity com

Available format(s): Postscript (PS) | Compressed Postscript (PS.GZ) | PDF | BibTeX Citation

Version: 20010703:153432 (All versions of this report)

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