Results 41 to 50 of about 3,529 (191)
A Chaos‐Driven Image Encryption Method With Möbius Transformations and Finite‐Ring Diffusion
Engineering Reports, Volume 8, Issue 11, November 2026.This paper presents a lightweight yet highly secure image encryption framework integrating chaotic dynamics, HKDF‐S3 key expansion, and Möbius‐Affine transformations. The proposed scheme achieves strong confusion and diffusion with minimal computational cost, demonstrating high resistance to differential and chosen‐plaintext attacks through dynamic key
Nayeem Ahmad Khan +4 more
wiley +1 more source
General Distinguishing Attacks on NMAC and HMAC with Birthday Attack Complexity [PDF]
, 2006 Kim {\em et al}. \cite{KiBiPrHo06} and Contini {\em et al}. \cite{CoYi06} studied on the security of HMAC and NMAC based on HAVAL, MD4, MD5, SHA-0 and SHA-1. Especially, they considered the distinguishing attacks.
Mridul Nandi, Donghoon Chang
core +1 more source
Concurrency and Computation: Practice and Experience, Volume 38, Issue 19, October 2026.ABSTRACTThis work presents a privacy‐preserving remote healthcare system that integrates blockchain technology with a root seed‐based pseudonymization mechanism and lightweight cryptographic controls. Addressing the privacy risks of public ledgers and the limited computational resources of medical IoT devices, the proposed system focuses strictly on ...
Hoc Minh Le, Özgür Öksüz
wiley +1 more source
Distinguishing Attacks on MAC/HMAC Based on A New Dedicated Compression Function Framework [PDF]
, 2012 A new distinguishing attack on HMAC and NMAC based on a dedicated compression function framework H, proposed in ChinaCrypt2008, is first presented in this paper, which distinguish the HMAC/NMAC-H from HMAC/NMAC with a random function. The attack needs 2^{
Xiaoqiu Ren, Zheng Yuan
core +1 more source
Verified Correctness and Security of mbedTLS HMAC-DRBG [PDF]
Proceedings of the 2017 ACM SIGSAC Conference on Computer and Communications Security, 2017 Appearing in CCS ...
Katherine Q. Ye +5 more
openaire +4 more sources
Alzheimer's &Dementia, Volume 22, Issue 9, September 2026.Abstract INTRODUCTION The adiposity–cognition relationship in aging is controversial. This study aimed to assess its sex‐ and age‐specific associations with Alzheimer’s disease (AD) pathology using multimodal biomarkers. METHODS In two longitudinal cohorts (Hubei Memory and Aging Cohort Study [HMACS], n = 2,349; Alzheimer’s Disease Neuroimaging ...
Jingjing Zhang +8 more
wiley +1 more source
On the Security of HMAC and NMAC Based on HAVAL, MD4, MD5, SHA-0 and SHA-1 [PDF]
, 2006 HMAC is a widely used message authentication code and a pseudorandom function generator based on cryptographic hash functions such as MD5 and SHA-1. It has been standardized by ANSI, IETF, ISO and NIST.
Jongsung Kim +3 more
core +2 more sources
Concurrency and Computation: Practice and Experience, Volume 38, Issue 15, August 2026.ABSTRACT This paper presents MusicoCrypt, a context‐bound music‐modulated stream‐encryption framework that incorporates audio‐derived public side information into a pseudorandom‐function‐centered encryption workflow. A shared reference recording is processed using a pitch‐tracking pipeline, and ordered note pairs are encoded as residues in ℤ132 ...
Cilen Gulsum Turan +2 more
wiley +1 more source
Die vraag na en aanbod van verpleegkundiges in Suid Afrika
Curationis, 1991 The threatening crisis in the nursing profession, especially in the public sector, led to a national investigation that was directed to the HMAC. A national nursing manpower analysis was undertaken by private consultants by means of a descriptive survey.
M.E. Muller
doaj +1 more source
Finite Element Analysis on the Creep Constitutive Equation of High Modulus Asphalt Concrete
Advances in Materials Science and Engineering, 2015 In order to obtain the viscoelastic constitutive relation of High Modulus Asphalt Concrete (HMAC), the constitutive relationship is used to carry on the various numerical calculation, utilize integral transforming in its Bailey-Norton creep rule, and ...
Xiu-shan Wang, Tao-tao Fan, Lum Kitmeng
doaj +1 more source