搜索结果: 1-15 共查到“知识库 A-A Collisions”相关记录258条 . 查询时间(0.07 秒)
MiMC and GMiMC are families of MPC-friendly block ciphers and hash functions. In this note, we show that the block ciphers MiMC-2n/n2n/n (or Feistel-MiMC) and univariate GMiMC are vulnerable to an att...
Plaintext Recovery Attacks against XTS Beyond Collisions
XTS Storage encryption Mode of operation
2019/7/17
XTS is an encryption scheme for storage devices standardized by IEEE and NIST. It is based on Rogaway's XEX tweakable block cipher and is known to be secure up to the collisions between the blocks, th...
Improved Low-Memory Subset Sum and LPN Algorithms via Multiple Collisions
time-memory trade-off representations parallel collision search
2019/7/15
For enabling post-quantum cryptanalytic experiments on a meaningful scale, there is a strong need for low-memory algorithms. We show that the combination of techniques from representations, multiple c...
From Collisions to Chosen-Prefix Collisions - Application to Full SHA-1
hash function cryptanalysis chosen-prefix collision
2019/5/13
A chosen-prefix collision attack is a stronger variant of a collision attack, where an arbitrary pair of challenge prefixes are turned into a collision. Chosen-prefix collisions are usually significan...
A kk-collision for a compressing hash function HH is a set of kk distinct inputs that all map to the same output. In this work, we show that for any constant kk, Θ(N12(1−12k−1))Θ(N12(1W...
Finding Collisions in a Quantum World: Quantum Black-Box Separation of Collision-Resistance and One-Wayness
post-quantum cryptography one-way permutation one-way trapdoor permutation
2018/11/12
Since the celebrated work of Impagliazzo and Rudich (STOC 1989), a number of black-box impossibility results have been established. However, these works only ruled out classical black-box reductions a...
Collisions and Semi-Free-Start Collisions for Round-Reduced RIPEMD-160
RIPEMD-160 semi-free-start collision collision
2017/8/29
In this paper, we propose an improved cryptanalysis of the double-branch hash function RIPEMD-160 standardized by ISO/IEC. Firstly, we show how to theoretically calculate the step differential probabi...
Collision Resistant Hashing for Paranoids: Dealing with Multiple Collisions
collision resistance multi collisions commitments
2017/6/1
A collision resistant hash (CRH) function is one that compresses its input, yet it is hard to find a collision, i.e. a x1≠x2x1≠x2 s.t. h(x1)=h(x2)h(x1)=h(x2). Collision resistant hash functions are on...
In this paper we explore the intriguing factors involved in the non one-one nature of the RC4, and explore new techniques and present interesting findings regarding the same. The first part of this pa...
SPATIOTEMPORAL ANALYSIS FOR WILDLIFE-VEHICLE-COLLISIONS BASED ON ACCIDENT STATISTICS OF THE COUNTY STRAUBING-BOGEN IN LOWER BAVARIA
wildlife-vehicle-collisions dynamic risk management remote sensing data land use vegetation periods
2016/11/30
During the last years the numbers of wildlife-vehicle-collisions (WVC) in Bavaria increased considerably. Despite the statistical registration of WVC and preventive measures at areas of risk along the...
Some sufficient conditions for infinite collisions of simple random walks on a wedge comb
wedge comb simple random walk infinite collision property local time
2016/1/19
In this paper, we give some sufficient conditions for the infinite collisions of independent simple random walks on a wedge comb with profile {f(n),n ∈ Z}.One interesting result is that two independen...
Finding collisions for MD4 hash algorithm using hybrid algorithm
Evolutionary algorithm hill climbing hash algorithm
2016/1/9
The modification of message that meets the sufficient conditions
for collision is found in the last step of differential attack proposed by
Wang et all. (2005) on MD4 hash algorithm. Here we show ho...
Improving Local Collisions: New Attacks on Reduced SHA-256
hash functions SHA-2 cryptanalysis
2015/12/31
In this paper, we focus on the construction of semi-free-start collisions for SHA-256, and show how to turn them into collisions. We present a collision attack on 28 steps of the hash function with pr...
Collisions and Gravitational Reaccumulation:Forming Asteroid Families and Satellites
Collisions and Gravitational Asteroid Families Satellites
2015/12/25
Numerical simulations of the collisional disruption of large asteroids show that although the parent body is totally shattered, subsequent gravitational reaccumulation leads to the formation of an ent...
Direct N-body Simulations of Rubble Pile Collisions
asteroids collisional physics impact processes planetary formation planetesimals
2015/12/25
There is increasing evidence that many kilometer-sized bodies in the Solar System are piles of rubble bound together by gravity. We present results from a project to map the parameter space of collisi...