Message Authentication Code

The recently introduced Galois/Counter Mode (GCM) of op- eration for block ciphers provides both encryption and message authenti- cation, using universal hashing based on multiplication in a binary finite field. We analyze its security and performance, and show that it is the most ecient mode of operation for high speed packet networks, by using a realistic model of a network

... Doraisanipalya, Bannerghatta Road Bangalore 560076, India Email: {suman.roy, debapriyay.mukhopadhyay, chandrashekhara.thejaswi} ghoneywell.com ... Network Design, Probabilistic Au-tomaton, Random Key Pre-distribution, Message Authenti-cation Code (MAC), ...

For objects stored in long-term digital archives, checking the integrity of the information stored is a prime necessity in the field of secure storage systems. Objects in a digital archive may include documents, images, databases, ..., etc. In a long-term archive those objects could be transferred in many various ways. In many cases, users are required to verify the authentication of the archived information. The goal of all authentication algorithmic techniques is to verify that information in the archive is authentic and has not been unintentionally or maliciously altered. Integrity checks not only detect malicious attacks but also identify data corrupted information. Keyed hash functions whose specific purpose is message authentication are called message authentication code (MAC) algorithms. Many iterated MACs can be described as iterated hash functions. In this case, the MAC key is fed as an input to the compression function, and be involved in the compression function f at ever...

In the present paper, a new protocol for authentication and key distribution is proposed. The new protocol has the aim to achieve a comparable performance with the Kerberos protocol and overcome its drawbacks. For authentication of the exchanged messages during authentication and key distribution, the new protocol uses the Message Authentication Codes (MAC) to exchange the Diffie-Hellman components. On the

High-throughput and area-efficient designs of hash functions and corresponding mechanisms for Message Authentication Codes (MACs) are in high demand due to new security protocols that have arisen and call for security services in every transmitted data packet. For instance, IPv6 incorporates the IPSec protocol for secure data transmission. However, the IPSec's performance bottleneck is the HMAC mechanism which is responsible for authenticating the transmitted data. HMAC's performance bottleneck in its turn is the underlying hash function. In this article a high-throughput and small-size SHA-256 hash function FPGA design and the corresponding HMAC FPGA design is presented. Advanced optimization techniques have been deployed leading to a SHA-256 hashing core which performs more than 30% better, compared to the next better design. This improvement is achieved both in terms of throughput as well as in terms of throughput/area cost factor. It is the first reported SHA-256 hashing...

N. Meghanathan et al. (Eds.): CNSA 2010, CCIS 89, pp. 105–113, 2010. © Springer-Verlag Berlin Heidelberg 2010 ... VLSI Design and Implementation of Combined Secure ... R. Kayalvizhi, R. Harihara Subramanian, R. Girish Santhosh, J. Gurubaran, and V. Vaidehi

Cryptographic hash functions had been very significant primitives to the cryptography. They have been utilized widely in cryptographic applications and most important of them is their use in the composition of efficient Message Authentication ...

Data integrity assurance and data origin authentication are essential security services in financial transactions, electronic commerce, electronic mail, software distribution, data storage and so on. The broadest definition of authentication within computing systems encompasses ...

... Beirut, Lebanon {wgi01, csg04, ame34, ayman, chehab}@aub.edu.lb Abstract-We present SinPack, a security protocol for preventing packet pollution attacks in network-coded content distribution networks. SinPack employs a homomorphically-addressable Bloom filter data ...

Message Authentication Codes (MACs) are very sensitive to any modification in the message. The verification fails even if there is a slight change in the message. However, special algorithms have been introduced that tolerate a small amount of noise in messages as required by some applications. Noise Tolerant Message Authentication Code (NTMAC) is an example of noise tolerant authenticator algorithm.

The paper discusses the compatibility of WiMax and Wi-Fi networks. These networks are most popular in industry now days. WiMax is used for MAN and Wi-Fi is used for LAN. WiMax standard provides point to multipoint broadband services up to 30 miles with the frequency ranges from 10 GHz to 60 GHz. This standard can deliver 75Mbps per channel with end-to-end encryption called CCMP (which is Counter Mode with Cipher Block Chaining Message Authentication Code Protocol) that is based on AES encryption. These measures are not enough in dense urban area especially if services are VoIP or multimedia based. So, Wi-Fi protocol IEEE 802.11 can solve this problem. Wi-Fi is a standard that covers 20 MHz per channel with 100-meter range. The future of next generation broadband network hides in these protocols.

Summary IEEE 802.11i security standard is emerging as an essential security requirement to support the growth of a wide range of wireless data services and applications. However, with the advent of more battery powered wireless devices, efficient and robust cryptographic designs are needed that do not impose high computational overhead and avoid mismatch with limited battery resources and low processing capabilities inherent on these wireless devices. In this paper, we (a) apply a systematic approach to determine computational complexity and efficiency of AES-CCMP (Advance Encryption Standard - Counter Mode with Cipher Block Chaining Message Authentication Code Protocol) designed for IEEE 802.11i, (b) propose a resource saving AES-CCMP design with hybrid CBC-MAC variant merged with Counter Mode encryption, defined as Counter Mode Block Chaining-MAC (or CMBC-MAC), for faster and more efficient data encryption and decryption. A comparative analysis of CCMP with hybrid CMBC-MAC computa...