1,496 research outputs found
A Security Analysis of IoT Encryption: Side-channel Cube Attack on Simeck32/64
Simeck, a lightweight block cipher has been proposed to be one of the
encryption that can be employed in the Internet of Things (IoT) applications.
Therefore, this paper presents the security of the Simeck32/64 block cipher
against side-channel cube attack. We exhibit our attack against Simeck32/64
using the Hamming weight leakage assumption to extract linearly independent
equations in key bits. We have been able to find 32 linearly independent
equations in 32 key variables by only considering the second bit from the LSB
of the Hamming weight leakage of the internal state on the fourth round of the
cipher. This enables our attack to improve previous attacks on Simeck32/64
within side-channel attack model with better time and data complexity of 2^35
and 2^11.29 respectively.Comment: 12 pages, 6 figures, 4 tables, International Journal of Computer
Networks & Communication
A Novel Latin Square Image Cipher
In this paper, we introduce a symmetric-key Latin square image cipher (LSIC)
for grayscale and color images. Our contributions to the image encryption
community include 1) we develop new Latin square image encryption primitives
including Latin Square Whitening, Latin Square S-box and Latin Square P-box ;
2) we provide a new way of integrating probabilistic encryption in image
encryption by embedding random noise in the least significant image bit-plane;
and 3) we construct LSIC with these Latin square image encryption primitives
all on one keyed Latin square in a new loom-like substitution-permutation
network. Consequently, the proposed LSIC achieve many desired properties of a
secure cipher including a large key space, high key sensitivities, uniformly
distributed ciphertext, excellent confusion and diffusion properties,
semantically secure, and robustness against channel noise. Theoretical analysis
show that the LSIC has good resistance to many attack models including
brute-force attacks, ciphertext-only attacks, known-plaintext attacks and
chosen-plaintext attacks. Experimental analysis under extensive simulation
results using the complete USC-SIPI Miscellaneous image dataset demonstrate
that LSIC outperforms or reach state of the art suggested by many peer
algorithms. All these analysis and results demonstrate that the LSIC is very
suitable for digital image encryption. Finally, we open source the LSIC MATLAB
code under webpage https://sites.google.com/site/tuftsyuewu/source-code.Comment: 26 pages, 17 figures, and 7 table
KLEIN: A New Family of Lightweight Block Ciphers
Resource-efficient cryptographic primitives become fundamental for realizing both security and efficiency in embedded systems like RFID tags and sensor nodes. Among those primitives, lightweight block cipher plays a major role as a building block for security protocols. In this paper, we describe a new family of lightweight block ciphers named KLEIN, which is designed for resource-constrained devices such as wireless sensors and RFID tags. Compared to the related proposals, KLEIN has advantage in the software performance on legacy sensor platforms, while in the same time its hardware implementation can also be compact
Recent Trends in Image Encryption: A Review
Security of multimedia data is gaining acceptance owing to the growth and acceptability of images in various applications and in telecommunication. Encryption is one of the ways to ensure high security of images as they are used in many fields such as in secure medical imaging services, military intelligence, internet and intranet communication, e-banking etc. These images are stored or transmitted through a network; hence the security of such image data is important. In this work, recently developed encryption techniques are studied and analyzed to promote further development of more encryption methods to ensure additional security and versatility. All the techniques reviewed came into existence within the last five years (2011-2015) and are found to be useful for the present day encryption applications. Each technique is unique in its own way, which might be suitable for different applications. As time goes on, new encryption techniques are evolving. Hence, fast and secure conventional encryption techniques will always be needed in applications requiring high rate of security
Mini-ciphers: a reliable testbed for cryptanalysis?
This paper reports on higher-order square analysis of the
AES cipher. We present experimental results of attack simulations on
mini-AES versions with word sizes of 3, 4, 5, 6 and 7 bits and describe
the propagation of higher-order Lambda-sets inside some of these distinguishers.
A possible explanation of the length of the square distinguishers uses the
concept of higher-order derivatives of discrete mappings
Security analysis of NIST-LWC contest finalists
Dissertação de mestrado integrado em Informatics EngineeringTraditional cryptographic standards are designed with a desktop and server environment in mind, so, with the
relatively recent proliferation of small, resource constrained devices in the Internet of Things, sensor networks,
embedded systems, and more, there has been a call for lightweight cryptographic standards with security,
performance and resource requirements tailored for the highly-constrained environments these devices find
themselves in.
In 2015 the National Institute of Standards and Technology began a Standardization Process in order to select
one or more Lightweight Cryptographic algorithms. Out of the original 57 submissions ten finalists remain, with
ASCON and Romulus being among the most scrutinized out of them.
In this dissertation I will introduce some concepts required for easy understanding of the body of work, do
an up-to-date revision on the current situation on the standardization process from a security and performance
standpoint, a description of ASCON and Romulus, and new best known analysis, and a comparison of the two,
with their advantages, drawbacks, and unique traits.Os padrões criptográficos tradicionais foram elaborados com um ambiente de computador e servidor em mente.
Com a proliferação de dispositivos de pequenas dimensões tanto na Internet of Things, redes de sensores e
sistemas embutidos, apareceu uma necessidade para se definir padrões para algoritmos de criptografia leve, com
prioridades de segurança, performance e gasto de recursos equilibrados para os ambientes altamente limitados
em que estes dispositivos operam.
Em 2015 o National Institute of Standards and Technology lançou um processo de estandardização com o
objectivo de escolher um ou mais algoritmos de criptografia leve. Das cinquenta e sete candidaturas originais
sobram apenas dez finalistas, sendo ASCON e Romulus dois desses finalistas mais examinados.
Nesta dissertação irei introduzir alguns conceitos necessários para uma fácil compreensão do corpo deste
trabalho, assim como uma revisão atualizada da situação atual do processo de estandardização de um ponto
de vista tanto de segurança como de performance, uma descrição do ASCON e do Romulus assim como as
suas melhores análises recentes e uma comparação entre os dois, frisando as suas vantagens, desvantagens e
aspectos únicos
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