Skip to Main content Skip to Navigation
New interface
Conference papers

On The Broadcast and Validity-Checking Security of PKCS #1 v1.5 Encryption

Abstract : This paper describes new attacks on PKCS #1 v1.5, a deprecated but still widely used RSA encryption standard. The first cryptanalysis is a broadcast attack, allowing the opponent to reveal an identical plaintext sent to different recipients. This is nontrivial because different randomizers are used for different encryptions (in other words, plaintexts coincide only partially). The second attack predicts, using a single query to a validity checking oracle, which of two chosen plaintexts corresponds to a challenge ciphertext. The attack's success odds are very high. The two new attacks rely on different mathematical tools and underline the need to accelerate the phase out of PKCS #1 v1.5.
Document type :
Conference papers
Complete list of metadata

Cited literature [17 references]  Display  Hide  Download
Contributor : Damien Vergnaud Connect in order to contact the contributor
Submitted on : Wednesday, March 16, 2011 - 2:37:36 PM
Last modification on : Thursday, March 17, 2022 - 10:08:36 AM
Long-term archiving on: : Friday, June 17, 2011 - 2:41:41 AM


Files produced by the author(s)




Aurélie Bauer, Jean-Sébastien Coron, David Naccache, Mehdi Tibouchi, Damien Vergnaud. On The Broadcast and Validity-Checking Security of PKCS #1 v1.5 Encryption. Applied Cryptography and Network Security, 8th International Conference, ACNS 2010, Jun 2010, Beijing, China. pp.1-18, ⟨10.1007/978-3-642-13708-2_1⟩. ⟨inria-00577142⟩



Record views


Files downloads