37 Result(s)
within
Cryptology
Yosuke Todo
Chapter
Conference Paper
Computer Science
-
Chapter and Conference Paper
Cube Attacks on Non-Blackbox Polynomials Based on Division Property
The cube attack is a powerful cryptanalytic technique and is especially powerful against stream ciphers. Since we need to analyze the complicated structure of a stream cipher in the cube attack, the cube attac...
-
Chapter and Conference Paper
Analyzing Key Schedule of Simon: Iterative Key Differences and Application to Related-Key Impossible Differentials
The current paper analyzes the key schedule function of lightweight block cipher Simon, which was designed by NSA in 2013. In particular, a list of all iterative key differences is provided for all members of the...
-
Chapter and Conference Paper
New Differential Bounds and Division Property of Lilliput: Block Cipher with Extended Generalized Feistel Network
This paper provides security analysis of lightweight block cipher Lilliput, which is an instantiation of extended generalized Feistel network (EGFN) developed by Berger et al. at SAC 2013. Its round function upda...
-
Chapter and Conference Paper
GIFT: A Small Present
In this article, we revisit the design strategy of PRESENT, leveraging all the advances provided by the research community in construction and cryptanalysis since its publication, to push the design up to its lim...
-
Chapter and Conference Paper
New Impossible Differential Search Tool from Design and Cryptanalysis Aspects
In this paper, a new tool searching for impossible differentials is presented. Our tool can detect any contradiction between input and output differences. It can also take into account the property inside the ...
-
Chapter and Conference Paper
Nonlinear Invariant Attack
In this paper we introduce a new type of attack, called nonlinear invariant attack. As application examples, we present new attacks that are able to distinguish the full versions of the (tweakable) block ciphers
-
Chapter and Conference Paper
Compact Representation for Division Property
The division property, which is a new method to find integral characteristics, was proposed at Eurocrypt 2015. Thereafter, some applications and improvements have been proposed. The bit-based division property...
-
Chapter and Conference Paper
Bit-Based Division Property and Application to Simon Family
Ciphers that do not use S-boxes have been discussed for the demand on lightweight cryptosystems, and their round functions consist of and, rotation, and xor. Especially, the Simon family is one of the most famous...
-
Chapter and Conference Paper
Wide Trail Design Strategy for Binary MixColumns
AES is one of the most common block ciphers and many AES-like primitives have been proposed. Recently, many lightweight symmetric-key cryptographic primitives have also been proposed. Some such primitives requ...
-
Chapter and Conference Paper
How Much Can Complexity of Linear Cryptanalysis Be Reduced?
The linear cryptanalysis proposed by Matsui is one of the most effective attacks on block ciphers, and he demonstrated an experimental cryptanalysis against DES at CRYPTO 1994. In this paper, we show how to op...
-
Chapter and Conference Paper
Integral Cryptanalysis on Full MISTY1
MISTY1 is a block cipher designed by Matsui in 1997. It was well evaluated and standardized by projects, such as CRYPTREC, ISO/IEC, and NESSIE. In this paper, we propose a key recovery attack on the full MISTY...
-
Chapter and Conference Paper
Structural Evaluation by Generalized Integral Property
In this paper, we show structural cryptanalyses against two popular networks, i.e., the Feistel Network and the Substitute-Permutation Network (SPN). Our cryptanalyses are distinguishing attacks by an improved...
-
Chapter and Conference Paper
Practical Cryptanalysis of a Public-Key Encryption Scheme Based on New Multivariate Quadratic Assumptions
In this paper, we investigate the security of a public-key encryption scheme introduced by Huang, Liu and Yang (HLY) at PKC’12. This new scheme can be provably reduced to the hardness of solving a set of quadr...
-
Chapter and Conference Paper
FFT Key Recovery for Integral Attack
An integral attack is one of the most powerful attacks against block ciphers. We propose a new technique for the integral attack called the Fast Fourier Transform (FFT) key recovery. When the integral distingu...
-
Chapter and Conference Paper
Cryptanalysis of Reduced-Round SIMON32 and SIMON48
SIMON family is one of the recent lightweight block cipher designs introduced by NSA. So far there have been several cryptanalytic results on this cipher by means of differential, linear and impossible differe...
-
Chapter and Conference Paper
Upper Bounds for the Security of Several Feistel Networks
In this paper, we are dealing with upper bounds for the security of some Feistel networks. Such a topic has been discussed since the introduction of Luby-Rackoff construction, but it is unrealistic constructio...
-
Chapter and Conference Paper
New Property of Diffusion Switching Mechanism on CLEFIA and Its Application to DFA
In this paper, we show a new property for the diffusion switching mechanism (DSM) which was proposed by Shirai and Shibutani in 2006, and propose new differential fault attacks (DFAs) on CLEFIA. The DSM is an ...
