International Institute of Information Technology, Hyderabad

About: International Institute of Information Technology, Hyderabad is a education organization based out in Hyderabad, India. It is known for research contribution in the topics: Authentication & Internet security. The organization has 2048 authors who have published 3677 publications receiving 45319 citations. The organization is also known as: IIIT Hyderabad & International Institute of Information Technology (IIIT).

A Dynamic ID-Based Generic Framework for Anonymous Authentication Scheme for Roaming Service in Global Mobility Networks

Abstract: User authentication scheme is an essential issue for offering roaming service to mobile users in global mobile network (GLOMONET). However, designing an anonymous user authentication scheme in GLOMONET is a challenging task since wireless communication networks are susceptible to a variety of attacks and mobile devices are of limited storage, processing and communication capabilities. Recently, Miyoung and Rhee examined the schemes proposed by Wei et al. and Wu et al., and came up with an improved authentication scheme offering user anonymity in GLOMONET. We point out that Miyoung and Rhee scheme is exposed to off-line password guessing and user impersonation attacks. Also, their scheme cannot offer user anonymity, password change or updating option and quick detection of wrong password. In order to overcome the flaws present in Miyoung and Rhee scheme, we propose a dynamic ID-based generic framework for anonymous authentication scheme for roaming service in GLOMONET, which is invincible to various prying attacks of intruders. Furthermore, the performance analysis proves that our scheme is versatile, simple and secure when compared to the existing authentication schemes.

Identifying Ragas in Indian Music

Abstract: In this work, we propose a method to identify the ragas of an Indian Carnatic music signal. This has several interesting applications in digital music indexing, recommendation and retrieval. However, this problem is hard due to (i) the absence of a fixed frequency for a note (ii) relative scale of notes (iii) oscillations around a note, and (iv) improvisations. In this work, we attempt the raga classification problem in a non-linear SVM framework using a combination of two kernels that represent the similarities of a music signal using two different features-pitch-class profile and n-gram distribution of notes. This differs from the previous pitch-class profile based approaches where the temporal information of notes is ignored. We evaluated the proposed approach on our own raga dataset and Comp Music dataset and show an improvement of 10.19% by combining the information from two features relevant to Indian Carnatic music.

RLC - A Reliable Approach to Fast and Efficient Live Migration of Virtual Machines in the Clouds

Abstract: Today, IaaS cloud providers are dynamically minimizing the cost of data centers operations, while maintaining the Service Level Agreement (SLA). Currently, this is achieved by the live migration capability, which is an advanced state-of-the-art technology of Virtualization. However, existing migration techniques suffer from high network bandwidth utilization, large network data transfer, large migration time as well as the destination's VM failure during migration. In this paper, we propose Reliable Lazy Copy (RLC) - a fast, efficient and a reliable migration technique. RLC provides a reasonable solution for high-efficiency and less disruptive migration scheme by utilizing the three phases of the process migration. For effective network bandwidth utilization and reducing the total migration time, we introduce a learning phase to estimate the writable working set (WWS) prior to the migration, resulting in an almost single time transfer of the pages. Our approach decreases the total data transfer by 1.16 x - 12.21x and the total migration time by a factor of 1.42x - 9.84x against the existing approaches, thus providing a fast and an efficient, reliable VM migration of the VMs in the cloud.

A secure password-based authentication and key agreement scheme using smart cards

Abstract: Authentication schemes present a user-friendly and scalable mechanism to establish the secure and authorized communication between the remote entities over the insecure public network. Later, several authentication schemes have proposed in the literature. However, most of the existing schemes do not satisfy the desirable attributes, such as resistance against known attacks and user anonymity. In 2012, Chen et?al. designed a robust authentication scheme to erase the weaknesses of Sood et?al.'s scheme. In 2013, Jiang et?al. showed that Chen et?al.'s scheme is vulnerable to password guessing attack. Furthermore, Jiang et?al. presented an efficient solution to overcome the shortcoming of Chen et?al.'s scheme. We demonstrate that Jiang et?al.'s scheme does not withstand insider attack, on-line and off-line password guessing attacks, and user impersonation attack. Their scheme also fails to provide user's anonymity. To overcome these drawbacks, we aim to propose an enhanced scheme, which reduces the computation overhead and satisfies all desirable security attributes, while retaining the original merits of Jiang et?al.'s scheme. The proposed scheme is also comparable in terms of the communication and computational overheads with Jiang et?al.'s scheme and other existing schemes. Furthermore, we simulate the enhanced scheme for the formal security analysis utilizing the widely-accepted AVISPA tool and show that the proposed scheme is resistant against active and passive attacks.