We will describe two types of MACs: one based on block ciphers and one based on hash functions. The MACs we describe require the sender and receiver to share a key. In many cases, it might be useful to allow anyone (without possession of a shared key) to be able to verify the originator of message, and we will thus describe how digital signatures allow ...
block-cipher based hash functionsdifferential cryptanalysisdouble block-length hash functionsiterated hash functionssecond preimageSummary: In this article, we focus on second preimages for iterated hash functions. More precisely, we introduce the notion of a $b$-block bypass which is closely related ...
This surprising result shows that the use of a checksum might actually weaken a hash function when used in a MAC. We stress that our attacks are generic, and they are in fact more efficient than some previous attacks proposed on MACs instanciated with concrete hash functions.We use techniques...
M14 aka MarsupilamiFourteen TurboSHAKE KeccakPRG: Pseudo-random generator based on Keccakripemd160import { ripemd160 } from '@noble/hashes/ripemd160'; const hash8 = ripemd160('abc'); const hash9 = ripemd160 .create() .update(Uint8Array.from([1, 2, 3])) .digest();See...
We revisit the double-pipe construction introduced by Lucks at Asiacrypt 2005. Lucks originally studied the construction for iterated hash functions and showed that the approach is effective in improving security against various types of collision and (second-)preimage attacks. Instead, in this paper...
NAME_model.ris an R script which you can use to produce a PDF image of the model based on your data. Load it to R by: $ Rscript NAME_model.r Then a pdf fileNAME_model.pdfwill be generated in your current directory. Note, R is required to draw this figure. ...
This universal-2 hash function is the CBC MAC itself. Since it is not too hard to upper bound the collision probability of the CBC MAC (see Lemma 4.1), this approach leads to a simple proof for EMAC, and ECBC as well. We then use the security of ECBC to prove security for FCBC, ...
There are currently twelve functions available in MAC3 serving as sub-commands. 安装&使用:(此处省略Python环境配置) pip install MACS3 #下载成功会有: #Successfully built MACS3 #Installing collected packages: cykhash, MACS3 #Successfully installed MACS3-3.0.0a4 cykhash-1.0.2 ...
There are currently twelve functions available in MAC3 serving as sub-commands. 安装&使用:(此处省略Python环境配置) pip install MACS3 #下载成功会有: #Successfully built MACS3 #Installing collected packages: cykhash, MACS3 #Successfully installed MACS3-3.0.0a4 cykhash-1.0.2 ...
(2007) `An update on the side channel cryptanalysis of macs based on cryptographic hash functions', Indocrypt 2007, pp.393-403.Gauravaram, P., Okeya, K.: An update on the side channel cryptanalysis of macs based on cryptographic hash functions. In: Srinathan, K., Rangan, C.P., Yung,...