[PDF] Top 20 Chosen IV Cryptanalysis on Reduced Round ChaCha and Salsa

... Thus we have n = 33 PNBs here. Finally we obtain, ∗ a = 0.014030 and ∗ = 0.003150. Taking α = 15, we get N = 22.46. Thus, we get the total complexity as 2 223+22.46 + 2 256−15 = 2 245.52 . While we got different kinds of ... See full document

... Contribution. This work complements the analysis by [15] with differential- based attacks on Kiasu-BC on eight rounds of Kiasu-BC . Our attacks share the observation that a chosen non-zero tweak difference allows ... See full document

... Our Contributions. In this paper, we look into the similarities and differences of GOST and Whirlpool, and improve previous attacks on GOST and Whirlpool under the hash function setting. First we give two improved ... See full document

... rotational cryptanalysis was not evaluated on Speck until a new method to deal with the constants was proposed in FSE 2017 ...of round constants into the analysis by combining rotational with differential ... See full document

... differential cryptanalysis up to 20 rounds of ...differential cryptanalysis has been applied up to 22 rounds of LBlock ...58 chosen plaintexts and the time complexity is 2 ...biclique ... See full document

... encrypt chosen texts, observes the corresponding encryptions and adaptively chooses new ciphertexts that are then decrypted in the hope for a certain property in their corresponding ...to ... See full document

... We could try to find a higher number of distinguishers (higher than 1024) but it does not make the attack faster. We will give details on this later in the section. The distinguishers are for 2.5 rounds and each one has ... See full document

... is exactly zero). To do this, we first guess the 20 bits of the last four-round subkeys relevant to R 16, { 7 } and get the value of L 0, { 0 ∼ 15 } kR 0, { 0,2 ∼ 14 } kR 16, { 7 } (regarded as the starting ... See full document

... The time complexity of the attack depends on the number of matches we obtain in Step 3. The expected number of matches is determined by several factors, and in particular, it depends on a stronger version of Property 2, ... See full document

... the chosen-key model: 15 rounds for LED-64 and 27 rounds for ...LED-64 reduced to 8 rounds, and LED-128 reduced to 16 ...supplementary cryptanalysis in different single and related-key models ... See full document

... LSB of registers are treated as original variables. In this case, the XOR-ed func- tion of approximations for each active S-box can be expressed as a quadratic function of these original 0-1 variables. Furthermore, there ... See full document

... (or chosen plaintexts), the division property can construct better distinguishers than previous ...of chosen plaintexts for the 10-round distinguisher on Keccak-f from 2 1025 to 2 515 ... See full document

... Integral cryptanalysis was introduced in [21], and has been used in the literature under the names square, integral or saturation attack. Integral distinguishers mainly make use of the observation that it is ... See full document

... the preimage length is minimized. Now we are left with total 384 linear equation in 384 variables. All of these linear equations are linearly independent. Applying Gaussian elimination, we can completely find the message ... See full document

... Abstract: Lightweight cryptography is a rapidly evolving area of research and it has great impact especially on the new computing environment called the Internet of Things (IoT) or the Smart Object networks (Holler et ... See full document

... key. Round function of Present , which is depicted in Figure 1, is same for both versions of Present and consists of standard op- erations such as subkey XOR, substitution and permutation: At the beginning of each ... See full document

... Given the 17-round approximation for SIMON-48, introduced in Section 5.3, we apply the ap- proach presented in Section 5.4 to extend key recovery over more number of rounds. Our key recovery for SIMON-48/72 and ... See full document

... cube-attack-like cryptanalysis on round-reduced Ketje in [DLWQ17], where dynamic variables inspired by dynamic cube attacks [DS11] are ...on round-reduced Keyak and Kec- cak used as ... See full document

... Furthermore, another construction that can be encountered in practice is XChaCha20, which is implemented in the Sodium crypto library [18]. This con- struction was first proposed for Salsa20 [6] and aims at extending the ... See full document

... Abstract. Zorro is an AES-like lightweight block cipher proposed in CHES 2013, which only uses 4 S-boxes per round. The designers showed the resistance of the cipher against various attacks and concluded the ... See full document