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检索条件"主题词=Message authentication code"

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Constructing Rate-1 MACs from Related-Key Unpredictable Block Ciphers: PGV Model Revisited

Constructing Rate-1 MACs from Related-Key Unpredictable Bloc...

引用

17th International Workshop on Fast Software Encryption

作者： Zhang, Liting Wu, Wenling Wang, Peng Zhang, Lei Wu, Shuang Liang, Bo Chinese Acad Sci Inst Software State Key Lab Informat Secur Beijing 100190 Peoples R China Grad Univ Chinese Acad Sci Beijing 100049 Peoples R China

ISBN: (纸本)9783642138577

Almost all current block-cipher-based MACs reduce their security to the pseudorandomness of their underlying block ciphers, except for a few of them to the unpredictability, a strictly weaker security notion than pseudorandomness. However, the latter MACs offer relatively low efficiency. In this paper, we investigate the feasibility of constructing rate-1 MACs from related-key unpredictable block ciphers. First, we show all the existing rate-1 MACs are insecure when instantiated with a special kind of related-key unpredictable block cipher. The attacks on them inspire us to propose an assumption that all the chaining values are available to adversaries for theoretically analyzing such MACs. Under this assumption, we study the security of 64 rate-1 MACs in keyed PGV model, and find that 1) 15 MACs are meaningless;2) 25 MACs are vulnerable to three kinds of attacks respectively and 3) 24 MACs are provably secure when their underlying block ciphers are related-key unpredictable. Furthermore, we refine these 24 provably secure rate-1 MACs in Compact PGV model by removing a useless parameter away, and find that the resulting 6 provably secure MACs are in fact equivalent to each other. In the aspect of efficiency, however, the low rate of these secure MACs does not necessarily mean they can run faster than none rate-1 one MACs, due to their large number of key schedules.

关键词： message authentication code Block Cipher Mode of Operation Provable Security

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Retrofitting Integrity Protection into Unused Header Fields of Legacy Industrial Protocols 48

Retrofitting Integrity Protection into Unused Header Fields ...

引用

48th Conference on Local Computer Networks

作者： Wagner, Eric Rothaug, Nils Wolsing, Konrad Bader, Lennart Wehrlet, Klaus Henze, Martin Fraunhofer FKIE Cyber Anal & Def Bonn Germany Rhein Westfal TH Aachen Commun & Distributed Syst Aachen Germany Rhein Westfal TH Aachen Secur & Privacy Ind Cooperat Aachen Germany

ISBN: (纸本)9798350300741;9798350300734

Industrial networks become increasingly interconnected, which opens the floodgates for cyberattacks on legacy networks designed without security in mind. Consequently, the vast landscape of legacy industrial communication protocols urgently demands a universal solution to integrate security features retroactively. However, current proposals are hardly adaptable to new scenarios and protocols, even though most industrial protocols share a common theme: Due to their progressive development, previously important legacy features became irrelevant and resulting unused protocol fields now offer a unique opportunity for retrofitting security. Our analysis of three prominent protocols shows that headers offer between 36 and 63 bits of unused space. To take advantage of this space, we designed the REtrofittable ProtEction Library (RePeL), which supports embedding authentication tags into arbitrary combinations of unused header fields. We show that RePeL incurs negligible overhead beyond the cryptographic processing, which can be adapted to hit performance targets or fulfill legal requirements.

关键词： industrial control systems retrofitting integrity protection message authentication code

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Optimized Hardware Design and Implementation of EC based Key Management Scheme for WSN 10

Optimized Hardware Design and Implementation of EC based Key...

引用

10th International Conference for Internet Technology and Secured Transactions (ICITST)

作者： Jilna, P. Deepthi, P. P. Jayaraj, U. K. Natl Inst Technol Dept Elect & Commun Engn Calicut Kerala India Natl Inst Elect & Informat Technol Calicut Kerala India

ISBN: (纸本)9781908320520

This paper presents the design and implementation of an integrated architecture for key exchange and authentication in wireless sensor networks (WSNs) employing elliptic curve cryptography (ECC) for key management. Instead of implementing a standard algorithm such as SHA or AES for authentication, this paper considers an elliptic curve based message authentication code (MAC) for optimized design of overall structure through hardware reuse. The proposed architecture time shares the point multiplication unit between functionalities of key exchange and MAC there by reducing the structural complexity. The proposed architecture is implemented over GF(2(163)) on a Kintex 7 FPGA board using Xilinx ISE. The EC point multiplication is done using Lopez-Dahab algorithm and the finite field elements are represented using Gaussian normal basis to reduce the computational complexity and resist side channel attack.

关键词： FPGA implementation wireless sensor network message authentication code Elliptic Curve Cryptography

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Single-Trace Side-Channel Analysis on Polynomial-Based MAC Schemes 11th

Single-Trace Side-Channel Analysis on Polynomial-Based MAC S...

引用

11th International Workshop on Constructive Side-Channel Analysis and Secure Design (COSADE)

作者： Ueno, Rei Fukushima, Kazuhide Nakano, Yuto Kiyomoto, Shinsaku Homma, Naofumi Tohoku Univ Res Inst Elect Commun Aoba Ku 2-1-1 Katahira Sendai Miyagi 9808577 Japan KDDI Res Inc Ohara 2-1-15 Fujumino Saitama 3568502 Japan

ISBN: (纸本)9783030687731;9783030687724

This paper presents the first side-channel analysis (SCA) on polynomial-based message authentication code (MAC) schemes which is applicable to Poly1305. Typical SCAs (e.g., simple power analysis (SPA) and differential power analysis (DPA)) and conventional attacks on GCM/GMAC that focus on the first multiplication result in the universal hashing (i.e., polynomial evaluation) cannot be applied to Poly1305 owing to one-time keys and the structure of prime-field multiplication. On the other hand, the proposed attack retrieves the hash key from a single side-channel trace (e.g., a power/EM trace given by one execution) with a non-negligible probability and is applicable to polynomial-based MAC schemes implemented on an 8-bit micro-controller. The proposed attack allows the attacker to forge the authentication tag even if the hash key is a one-time key. The basic idea of the proposed attack is to exploit the addition in polynomial-based MAC schemes. Since the output or one input of the addition in these MAC schemes is known, we can efficiently estimate the unknown operands of addition, and then retrieve the hash key by the polynomial factorizations with the estimated candidates. This study also shows a cost-effective countermeasure for ChaCha20-Poly1305 using a combination of a lightweight masked Poly1305 and first-order mask conversion from Boolean to arithmetic.

关键词： ChaCha20-Poly1305 Polynomial hash function message authentication code Authenticated encryption Side-channel analysis

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Chaskey: An Efficient MAC Algorithm for 32-bit Microcontrollers 1

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21st International Conference on Selected Areas in Cryptography (SAC)

作者： Mouha, Nicky Mennink, Bart Van Herrewege, Anthony Watanabe, Dai Preneel, Bart Verbauwhede, Ingrid Katholieke Univ Leuven COSIC ESAT Dept Elect Engn Ghent Belgium iMinds Ghent Belgium Yokohama Res Lab Yokohama Kanagawa Japan

ISBN: (数字)9783319130514

ISBN: (纸本)9783319130514;9783319130507

We propose Chaskey: a very efficient message authentication code (MAC) algorithm for 32-bit microcontrollers. It is intended for applications that require 128-bit security, yet cannot implement standard MAC algorithms because of stringent requirements on speed, energy consumption, or code size. Chaskey is a permutation-based MAC algorithm that uses the Addition-Rotation-XOR (ARX) design methodology. We prove that Chaskey is secure in the standard model, based on the security of an underlying Even-Mansour block cipher. Chaskey is designed to perform well on a wide range of 32-bit microcontrollers. Our benchmarks show that on the ARM Cortex-M3/M4, our Chaskey implementation reaches a speed of 7.0 cycles/byte, compared to 89.4 cycles/byte for AES-128-CMAC. For the ARM Cortex-M0, our benchmark results give 16.9 cycles/byte and 136.5 cycles/byte for Chaskey and AES-128-CMAC respectively.

关键词： Microcontroller message authentication code Standard model security Permutation-based ARX

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Tweakable Blockciphers with Asymptotically Optimal Security

Tweakable Blockciphers with Asymptotically Optimal Security

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20th International Workshop on Fast Software Encryption (FSE)

作者： Lampe, Rodolphe Seurin, Yannick Univ Versailles Versailles France ANSSI Paris France

ISBN: (纸本)9783662439333;9783662439326

We consider tweakable blockciphers with beyond the birthday bound security. Landecker, Shrimpton, and Terashima (CRYPTO 2012) gave the first construction with security up to O(2(2n/3)) adversarial queries (n denotes the block size in bits of the underlying blockcipher), and for which changing the tweak does not require changing the keys for blockcipher calls. In this paper, we extend this construction, which consists of two rounds of a previous proposal by Liskov, Rivest, and Wagner (CRYPTO 2002), by considering larger numbers of rounds r > 2. We show that asymptotically, as r increases, the resulting tweakable blockcipher approaches security up to the information bound, namely O(2 n) queries. Our analysis makes use of a coupling argument, and carries some similarities with the analysis of the iterated Even-Mansour cipher by Lampe, Patarin, and Seurin (ASIACRYPT 2012).

关键词： Tweakable blockcipher Beyond birthday bound Coupling message authentication code

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Enabling Authenticated Data Exchanges in Industrial Control Systems 6

Enabling Authenticated Data Exchanges in Industrial Control ...

引用

6th International Symposium on Digital Forensic and Security (ISDFS)

作者： Duka, Adrian-Vasile Genge, Bela Haller, Piroska Petru Maior Univ Tirgu Mures Dept Elect Engn & Comp Sci 1 N Iorga St Tirgu Mures Mures 540088 Romania Petru Maior Univ Tirgu Mures Dept Informat 1 N Iorga St Tirgu Mures Mures 540088 Romania

ISBN: (纸本)9781538634493

In the context of the ever more increasing number of cyber attacks targeted against Industrial Control Systems, the protection of data (e.g., process variables) commonly exchanged between the system's components (e.g., between Programmable Logic Controllers - PLCs, and Human Machine Interfaces - HMIs), is of greatest importance. In spite of their modest computational resources, we show that, when compared to other computer systems (e.g., traditional PCs), it is possible to enhance the control programs running within PLCs with message authentication codes (MACs) constructions. These enable to authenticate the exchanged data, therefore providing a means to simultaneously verify both the data integrity and the authentication of process variables. This paper presents PLC specific details for several MAC implementations and assesses their efficiency, in terms of execution time, as tested on Phoenix Contact's ILC 350 PN controller.

关键词： industrial control systems cryptography data authentication message authentication code hash functions

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Integrity and Authenticity of ADS-B Broadcasts

Integrity and Authenticity of ADS-B Broadcasts

引用

IEEE Aerospace Conference

作者： Kacem, Thabet Wijesekera, Duminda Costa, Paulo George Mason Univ 4400 Univ Dr Fairfax VA 22030 USA George Mason Univ Comp Sci Fairfax VA 22030 USA George Mason Univ Ctr Assurance Res & Engn Fairfax VA 22030 USA

ISBN: (纸本)9781479953806

We propose a novel approach to provide authenticity and integrity of Automatic Dependent Surveillance-Broadcast (ADS-B) messages. We employ a key-management schema for authentication and rely on a keyed-hashed message authentication code (HMAC) for integrity. Our approach avoids scalability and compatibility issues, as we neither change the packet format nor its size.

关键词： packet format broadcasting message authentication code authentication

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KBC: Multiple Key Generation using Key Block Chaining

KBC: Multiple Key Generation using Key Block Chaining

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International Conference on Computational Intelligence and Data Science (ICCIDS)

作者： Prajapati, Payal Chaudhari, Kinjal Nirma Univ Inst Technol Dept Comp Sci & Engn Ahmadabad 382481 Gujarat India

Cryptography is an important aspect of securing communications, however, the encryption scheme may be known to the attacker(s). Hence, the key can be rewarded as a crucial part of any cryptographic algorithm. With the symmetric key, researchers have developed chaining concepts where the output of one operation becomes an input to the next one. Such concept of modes of operation (Cipher Block Chaining) is integrated in this article to generate multiple key blocks. The generated keys can be provided to an individual block of plaintext for any encryption technique as per the requirements. The proposed Key Block Chaining (KBC) approach can also be referred to as a key derivation approach. The basic concepts of Advanced Encryption Standard and message authentication code have also been incorporated in the proposed model to introduce randomness, and thereby, ensuring security as well as robustness. To assess the randomness of the sequence of generated keys, KBC is implemented and tested using the National Institute of Standards and Technology statistical test suite and reasonable randomness has been successfully achieved. Possible variations and key points of the proposed approach along with statistical analysis and significance of our work have been discussed. (C) 2020 The Authors. Published by Elsevier B.V.

关键词： Advanced Encryption Standard Cipher Block Chaining Key Generation Key Block Chaining message authentication code

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Twine Stack: A Hybrid Mechanism Achieving Less Cost for Return Address Protection 30

Twine Stack: A Hybrid Mechanism Achieving Less Cost for Retu...

引用

IEEE 30th Asian Test Symposium (ATS)

作者： Xu, Qizhen Chen, Liwei Shi, Gang Chinese Acad Sci Inst Informat Engn Beijing Peoples R China Univ Chinese Acad Sci Sch Cyber Secur Beijing Peoples R China

ISBN: (纸本)9781665440516

Return-oriented programming(ROP) is a prevalent technique that targets return addresses to hijack control flow. To prevent such attack, researchers mainly focus on either Shadow Stack or MAC-based mechanisms(message code authentication). But Shadow Stack suffers from additional memory overhead and information leakage, while MAC-based mechanisms(e.g. Zipper Stack) impose high runtime overhead for MAC calculations. In this paper, we propose Twine Stack, a hybrid and efficient return address protection mechanism with lightweight hardware extension. It utilizes a tiny hardware shadow stack to realize a new multi-chain Zipper Stack. Specifically, each entry in the shadow stack stores a return address and its MAC in each chain, allowing queueing calculation with just one hash module. At meantime, some return address verifications could be done by comparison with the hardware shadow stack, instead of calculation again. We implemented Twine Stack on RISC-V architecture, and evaluated it on FPGA board. Our experiments show that Twine Stack reduces over 95% hash verifications, and imposes merely 1.38% performance overhead with an area overhead of 974 LUTs and 726 flip flops. The result demonstrates that our hybrid scheme mitigates the drawbacks of each separate scheme.

关键词： Return-oriented programming Shadow stack message authentication code

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