Search results for: K. P. Subbalakshmi

Items from 1 to 20 out of 36 results

chapter

On Optimizing the Security-Throughput Trade-Off in Wireless Networks with Adversaries

Mohamed A. Haleem, Chetan Nanjunda Mathur, R. Chandramouli, K. P. Subbalakshmi

Lecture Notes in Computer Science > Applied Cryptography and Network Security > Security and Privacy > 448-458

In this paper, we model the adversary (eavesdropper) present in the wireless communication medium using probabilistic models. We precisely formulate the security-throughput optimization and derive analytical solutions. The effect of different adversary models, and single and multi-rate modulation schemes (BPSK and MQAM) are studied. Simulation results are given to show that significant throughput...

chapter

Adaptive Context Modeling for Deception Detection in Emails

Peng Hao, Xiaoling Chen, Na Cheng, R. Chandramouli, more

Lecture Notes in Computer Science > Machine Learning and Data Mining in Pattern Recognition > WebMining/Information Mining > 458-468

Deception detection in e-mails is addressed in this paper. An adaptive probabilistic context modeling method that spans information theory and suffix trees is proposed. Some properties of the proposed adaptive context model are also discussed. Experimental results on truthful (ham) and deceptive (scam) e-mail data sets are presented to evaluate the proposed detector. The results show that adaptive...

chapter

High Diffusion Cipher: Encryption and Error Correction in a Single Cryptographic Primitive

Chetan Nanjunda Mathur, Karthik Narayan, K. P. Subbalakshmi

Lecture Notes in Computer Science > Applied Cryptography and Network Security > Cryptography > 309-324

In this paper we combine the error correction and encryption functionality into one block cipher, which we call High Diffusion (HD) cipher. The error correcting property of this cipher is due to the novel error correction code which we call High Diffusion code used in its diffusion layer. Theoretical bounds on the performance of the HD cipher in terms of security and error correction are derived....

chapter

Authorship Similarity Detection from Email Messages

Xiaoling Chen, Peng Hao, R. Chandramouli, K. P. Subbalakshmi

Lecture Notes in Computer Science > Machine Learning and Data Mining in Pattern Recognition > WebMining/Information Mining > 375-386

It is easy to hide the true identity of the author of an email. The author’s actual name, email address, etc. can be changed arbitrarily to deceive an email receiver. For example, a sender can change his/her identity in the email header to send different emails to various recipients. Therefore, in this paper, we investigate techniques for authorship similarity detection from the text content of a...

article

Software defined access for HetNets

Vidya Sagar, R. Chandramouli, K. P. Subbalakshmi

IEEE Communications Magazine > 2016 > 54 > 1 > 84 - 89

We present software defined access (SDA), an architecture for HetNets that incorporates various elements of SDN and software defined wireless networking (SDWN). SDA introduces a novel logical control path across radio interfaces and up to mobile devices. This control path allows SDA to regulate and configure data path via different RATs. Unlike SDN and SDWN, SDA can be deployed without changing network...

article

Joint-channel modeling to attack QIM steganography

Hafiz Malik, K. P. Subbalakshmi, R. Chandramouli

Multimedia Tools and Applications > 2016 > 75 > 21 > 13585- 13611

This paper presents a statistical steganalysis framework to attack quantization index modulation (QIM) based steganography. The quantization process is generally modeled as an additive noise channel. The proposed method exploits the fact that plain-quantization (quantization without message embedding) decreases local-randomness (or increases local-correlation) in the resulting quantized image. Moreover,...

article

Spatio-Temporal Analysis of Passive Consumption in Internet Media

S. Anand, M. Venkataraman, K. P. Subbalakshmi, R. Chandramouli

IEEE Transactions on Knowledge and Data Engineering > 2015 > 27 > 10 > 2839 - 2850

Internet users can be classified as two types: (a) active users—actively contribute to blogs, publish opinions, write comments in Youtube, tweet messages, etc. and (b) passive consumers who only consume Internet information without contributing to it. While the majority of current social media research deals with active user analysis, there is very little work in understanding the dynamics of passive...

chapter

Cloud offloading for multi-radio enabled mobile devices

S. Eman Mahmoodi, K. P. Subbalakshmi, Vidya Sagar

2015 IEEE International Conference on Communications (ICC) > 5473 - 5478

ICC 2015 - 2015 IEEE International Conference on Communications

The advent of 5G networking technologies has increased the expectations from mobile devices, in that, more sophisticated, computationally intense applications are expected to be delivered on the mobile device which are themselves getting smaller and sleeker. This predicates a need for offloading computationally intense parts of the applications to a resource strong cloud. Parallely, in the wireless...

article

Effective Bandwidth for Delay Tolerant Secondary User Traffic in Multi-PU, Multi-SU Dynamic Spectrum Access Networks

S. Ebrahim Safavi, K. P. Subbalakshmi

IEEE Transactions on Cognitive Communications and Networking > 2015 > 1 > 2 > 175 - 184

In this paper, we study two important quality of service (QoS) parameters of dynamic spectrum access (DSA) networks with multiple primary and secondary users. We assume that the secondary users (SUs) are delay tolerant and model the primary user (PU) and SU activity as Markov chains with ON and OFF states. We derive a closed form expression for the probability distribution of buffer occupancy for...

chapter

A two-stage algorithm to estimate the source of information diffusion in social media networks

Alireza Louni, K. P. Subbalakshmi

2014 IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS) > 329 - 333

IEEE INFOCOM 2014 - IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS)

We study the important problem of source localization in the context of information spreads in large social networks. Specifically, we design a Maximum-Likelihood source localization algorithm that is especially suited to large social networks. Our proposed algorithm requires about 3% fewer sensor nodes than other single stage algorithms for the same level of accuracy in detection. For practical social...

article

Exploiting Channel Fragmentation and Aggregation/Bonding to Create Security Vulnerabilities

Santhanakrishnan Anand, Shamik Sengupta, Kai Hong, K. P. Subbalakshmi, more

IEEE Transactions on Vehicular Technology > 2014 > 63 > 8 > 3867 - 3874

We address a unique security vulnerability due to spectrum fragmentation, aggregation, and bonding in IEEE 802.22-based dynamic spectrum access (DSA) networks and in Long-Term Evolution (LTE) and Evolved High-Speed Packet Access (HSPA+) networks. Typically, channel fragmentation, aggregation, and bonding have been perceived as a means of enhancing the bandwidth and throughput for the users. However,...

chapter

Optimizing flow control in multi-interface wireless cognitive radio networks

Alireza Louni, K. P. Subbalakshmi

2013 IEEE Global Communications Conference (GLOBECOM) > 1227 - 1232

GLOBECOM 2013 - 2013 IEEE Global Communications Conference

This paper solves the optimal flow management problem in cognitive radio (CR) networks with multiple self-interested CRs and multiple self interested servers with multiple radio interfaces. We formulate a novel flow management problem in which the cognitive nodes compete to minimize the total delay over all interfaces while at the same time the servers compete to maximize their individual profit....

chapter

Reciprocity and Fairness in Medium Access Control Games

M. Azarafrooz, R. Chandramouli, K. P. Subbalakshmi

2013 22nd International Conference on Computer Communication and Networks (ICCCN) > 1 - 5

2013 22nd International Conference on Computer Communication and Networks (ICCCN 2013)

In wireless communication systems users compete for communication opportunities through a medium access control protocol. Previous research has shown that selfish behavior in medium access games could lead to inefficient and unfair resource allocation. We introduce a new notion of reciprocity in a medium access game and derive the corresponding Fairness Nash equilibrium. Further, using mechanism design...

article

A Quantitative Model and Analysis of Information Confusion in Social Networks

S. Anand, K. P. Subbalakshmi, R. Chandramouli

IEEE Transactions on Multimedia > 2013 > 15 > 1 > 207 - 223

Information consumers in online social networks receive information from multiple information providers, which results in confusion. The amount of confusion depends on three main factors—(a) attributes of the source, (b) characteristics of the consumer and (c) trust relation between the information provider and the consumer. While information confusion has been qualitatively observed in social networks,...

article

Altruism in social networks: good guys do finish first

S. Anand, R. Chandramouli, K. P. Subbalakshmi, M. Venkataraman

Social Network Analysis and Mining > 2013 > 3 > 2 > 167-177

Altruism in social networks was traditionally considered based on user relationships and requirements. The capability of a user to help has seldom been taken into account while studying altruism. Also, to the best of our knowledge, no quantitative analysis has been made to determine the benefits of altruism. Here we quantitatively study the amount of altruism of users based on the help extended by...

chapter

Measuring and quantifying the silent majority on the Internet

Mukundan Venkataraman, K. P. Subbalakshmi, R. Chandramouli

2012 35th IEEE Sarnoff Symposium > 1 - 5

2012 35th IEEE Sarnoff Symposium

Increasingly, researchers are mining social media as a way of inferring public sentiment from the Internet. While ways to measure social media participation are beginning to be well established, there are little ways to measure the silent voice of a passive consumer. Passive consumers refrain from actively offering opinions, and as such cannot be completely quantified using social media crawls alone...

article

Nonparametric Steganalysis of QIM Steganography Using Approximate Entropy

Hafiz Malik, K. P. Subbalakshmi, R. Chandramouli

IEEE Transactions on Information Forensics and Security > 2012 > 7 > 2 > 418 - 431

This paper proposes an active steganalysis method for quantization index modulation (QIM)-based steganography. The proposed nonparametric steganalysis method uses irregularity (or randomness) in the test image to distinguish between the cover image and the stego image. We have shown that plain quantization (quantization without message embedding) induces regularity in the resulting quantized object,...

article

Impact of Primary User Emulation Attacks on Dynamic Spectrum Access Networks

Z. Jin, S. Anand, K. P. Subbalakshmi

IEEE Transactions on Communications > 2012 > 60 > 9 > 2635 - 2643

Primary user emulation attack (PUEA) is a denial of service (DoS) attack unique to dynamic spectrum access (DSA) networks. While there have been studies in the literature to detect and mitigate PUEA, the impact of PUEA on the performance of secondary networks has seldom been studied. In this paper, we analyze how PUEA affects call dropping and delay in secondary networks carrying both real-time traffic...

chapter

Security Vulnerability Due to Channel Aggregation/Bonding in LTE and HSPA+ Network

S. Anand, K. Hong, R. Chandramouli, S. Sengupta, more

2011 IEEE Global Telecommunications Conference - GLOBECOM 2011 > 1 - 5

GLOBECOM 2011 - 2011 IEEE Global Communications Conference

We address a unique security vulnerability in long term evolution (LTE) advanced and high speed packet access (HSPA+) wireless networks due to carrier/channel bonding. This vulnerability is shown to result in various amounts of service disruption based on the radio network parameters and the user locations. Typically, channel bonding have been perceived as a means to enhance the bandwidth and throughput...

chapter

Using Sybil Identities for Primary User Emulation and Byzantine Attacks in DSA Networks

Yi Tan, Kai Hong, Shamik Sengupta, K. P. Subbalakshmi

2011 IEEE Global Telecommunications Conference - GLOBECOM 2011 > 1 - 5

GLOBECOM 2011 - 2011 IEEE Global Communications Conference

In this paper, we investigate a new type of denialof- service attack in dynamic spectrum access networks - Sybilenabled attack. In this attack, the attacker not only launches the primary user emulation (PUE) attacks but also creates and infiltrates multiple Sybil identities to compromise the decision making process of the secondary network via Byzantine attacks. We implement this attack in our cognitive...

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GAMES (7)
COGNITIVE RADIO (6)
PROTOCOLS (6)
SWITCHES (6)
PEER TO PEER COMPUTING (5)
MARKOV PROCESSES (4)
MATHEMATICAL MODEL (4)
RADIO SPECTRUM MANAGEMENT (4)
SENSORS (4)
TELECOMMUNICATION SECURITY (4)
ANALYTICAL MODELS (3)
EMULATION (3)
ENTROPY (3)
EQUATIONS (3)
RESOURCE MANAGEMENT (3)
SECURITY (3)
SERVERS (3)
STEGANALYSIS (3)
VECTORS (3)
BANDWIDTH (2)
BONDING (2)
COMPUTER ARCHITECTURE (2)
COMPUTER CRIME (2)
COOPERATIVE GAME (2)
COORDINATED DENIAL-OF-SERVICE ATTACKS (2)
DATA MODELS (2)
DEGRADATION (2)
DELAYS (2)
DISCRETE COSINE TRANSFORMS (2)
DYNAMIC SPECTRUM ACCESS (2)
GAME THEORY (2)
IEEE 802.11 STANDARDS (2)
IEEE COMMUNICATIONS SOCIETY (2)
INTERNET (2)
MAXIMUM LIKELIHOOD ESTIMATION (2)
MEDIA (2)
NASH EQUILIBRIUM (2)
NOISE (2)
NUMERICAL MODELS (2)
OPTIMIZATION (2)
PRICING (2)
PROACTIVE SECURITY PROTOCOLS (2)
PUEA (2)
QUALITY OF SERVICE (2)
QUANTIZATION INDEX MODULATION (2)
RADIO NETWORKS (2)
SILICON (2)
SOCIAL NETWORKS (2)
STEGANOGRAPHY (2)
THROUGHPUT (2)
TWITTER (2)
WIRELESS COMMUNICATION (2)
3D-CTMC (1)
802.22 SECONDARY NETWORKS (1)
ACCURACY (1)
AGGRESSION (1)
ALGORITHM DESIGN AND ANALYSIS (1)
ALGORITHMIC ENTROPY (1)
ALTRUISM (1)
APPLICATION PROGRAM INTERFACE (1)
APPLICATION PROGRAM INTERFACES (1)
APPROXIMATE ENTROPY (1)
APPROXIMATION METHODS (1)
APPROXIMATION THEORY (1)
ASYMPTOTIC TAIL BEHAVIOR (1)
ATMOSPHERIC MEASUREMENTS (1)
AUTHORSHIP SIMILARITY (1)
BIOLOGICAL SYSTEM MODELING (1)
BLOCK CIPHER (1)
BUFFER OCCUPANCY (1)
BYZANTINE ATTACK (1)
CALL DROPPING (1)
CALL DROPPING PERFORMANCE (1)
CLUSTERING ALGORITHMS (1)
CODING AND CRYPTOGRAPHY (1)
COGNITIVE RADIO NETWORK (1)
COGNITIVE RADIO NETWORKS (1)
COLLABORATION (1)
COMMODITY HARDWARE (1)
COMMODITY MARKET (1)
COMMUNITIES (1)
COMPETITIVE SPECTRUM TRADING (1)
COMPLEXITY (1)
COMPLEXITY THEORY (1)
COMPUTERS (1)
CONFERENCES (1)
CONFUSION (1)
CONVERGENCE (1)
COORDINATED DOS ATTACKS (1)
COORDINATED USER BEHAVIOR (1)
CORRELATION (1)
DATA-HIDING (1)
DECEPTION DETECTION (1)
DECISION MAKING (1)
DECODING (1)
DELAY (1)
DENIAL OF SERVICE (1)
DENIAL-OF-SERVICE ATTACK (1)
DENIAL-OF-SERVICE THREATS (1)
DISCRETE TIME SYSTEMS (1)
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INFONA - science communication portal

Search results for: K. P. Subbalakshmi

On Optimizing the Security-Throughput Trade-Off in Wireless Networks with Adversaries

Adaptive Context Modeling for Deception Detection in Emails

High Diffusion Cipher: Encryption and Error Correction in a Single Cryptographic Primitive

Authorship Similarity Detection from Email Messages

Software defined access for HetNets

Joint-channel modeling to attack QIM steganography

Spatio-Temporal Analysis of Passive Consumption in Internet Media

Cloud offloading for multi-radio enabled mobile devices

Effective Bandwidth for Delay Tolerant Secondary User Traffic in Multi-PU, Multi-SU Dynamic Spectrum Access Networks

A two-stage algorithm to estimate the source of information diffusion in social media networks

Exploiting Channel Fragmentation and Aggregation/Bonding to Create Security Vulnerabilities

Optimizing flow control in multi-interface wireless cognitive radio networks

Reciprocity and Fairness in Medium Access Control Games

A Quantitative Model and Analysis of Information Confusion in Social Networks

Altruism in social networks: good guys do finish first

Measuring and quantifying the silent majority on the Internet

Nonparametric Steganalysis of QIM Steganography Using Approximate Entropy

Impact of Primary User Emulation Attacks on Dynamic Spectrum Access Networks

Security Vulnerability Due to Channel Aggregation/Bonding in LTE and HSPA+ Network

Using Sybil Identities for Primary User Emulation and Byzantine Attacks in DSA Networks

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