Publication

Cryptanalysis of the ISDB Scrambling Algorithm (MULTI2)

Pouyan Sepehrdad, Jorge Nakahara
2009
Conference Papers

Abstract

MULTI2 is the block cipher used in the ISDB standard for scrambling digital multimedia content. MULTI2 is used in Japan to se- cure multimedia broadcasting, including recent applications like HDTV and mobile TV. It is the only cipher speciﬁed in the 2007 Japanese ARIB standard for conditional access systems. This paper presents a theoretical break of MULTI2 (not relevant in practice), with shortcut key recovery attacks for any number of rounds. We also describe equivalent keys and linear attacks on reduced versions with up 20 rounds (out of 32), improv- ing on the previous 12-round attack by Matsui and Yamagishi. Practical attacks are presented on up to 16 rounds.

Official source

https://infoscience.epfl.ch/entities/publication/86f32d11-8ece-4d16-92f9-e543664cedbf

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Cryptanalysis of the ISDB Scrambling Algorithm (MULTI2)

Chat with Graph Search

Near Collision Attack Against Grain V1

Green Cryptography and Other Optimisations

Atom: A Stream Cipher with Double Key Filter