Most of the existing secure time synchronization protocols incur high communication and storage costs, and are subject to a few known security attacks. A secure intragroup time synchronization technique to. Although there are many surveys on wireless sensor networks, most of the existing surveys do not focus on time synchronization. One promising approach to achieve time synchronization in wsn, with significantly reduced energy consumption, is the receiveronly synchronization approach. The distributed wireless sensor networks heavily depends on the time synchronization for various reasons such as determining location and proximity of the deployed sensor nodes, intra network coordination among different sensor nodes, temporal messege ordering, security, time division multiplexing in wireless. Attackresilient time synchronization for wireless sensor. This toolbox includes protocols for secure pairwise and group synchronization of nodes that lie in each others power ranges and of nodes that are separated by. Secure time synchronization in wireless sensor networks require time message confidentiality, integrity and authentication. An approach towards time synchronization based secure. Over the past few years, a number of secure time synchronization schemes have been proposed for sensor networks. Wireless sensor network medium access control clock synchronization. Although the synchronization is well studied in last few years.
Almost any form of sensor data fusion or coordinated actuation requires synchronized physical time for reasoning about events in the physical world. Clock synchronization is of critical importance for several applications in wireless and mobile sensor networks. Written by awardwinning engineers whose research has been sponsored by the u. Secure pairwise broadcast time synchronization in wireless sensor networks abstract. Time is also used as a basis for determining the freshness of received packets and the validity of cryptographic certificates. The recently developed averageconsensusbased time synchronization protocol ats is a promising alternative as it does not depend on any reference node or. Free download secure localization and time synchronization for wireless sensor and ad hoc networks advances in information security pdf. Delay measurement time synchronization for wireless sensor networks dmts dmts relies on a masterslave synchronization, senderreceiver synchronization, and clockcorrection approach. We propose a novel approach to securely and efficiently synchronize nodes at ban level andor wsn level. We propose a secure time synchronization toolbox to counter these attacks.
This paper studies the algorithm design and analysis in secure time synchronization for resourceconstrained industrial wireless sensor networks under sybil attacks, which cannot be well addressed by existing methods. This toolbox includes protocols for secure pairwise and group synchronization of nodes that lie in each others power ranges and of nodes that. We consider an adversary that aims at tampering with the clock synchronization by intercepting messages, replaying intercepted messages after the adversarys choice of delay, and capturing nodes i. National science foundation nsf, ibm, and ciscos university research program, wireless sensor networks. Wireless sensor networks wsns have emerged as an interesting research area in the last few years. Time synchronization in wireless networks is extremely important for basic communication, but it also provides the ability to detect movement, location, and proximity. Time synchronization in hierarchical tesla wireless sensor. Jul 01, 2005 in addition to networking, data management is an important challenge given the high volumes of data that are generated by sensor nodes. In this article, we analyze attacks on existing time synchronization protocols for wireless sensor networks and we propose a secure time synchronization. Aotsp has the lowest communication cost among the same type algorithms. Secure localization and time synchronization for wireless sensor and ad hoc networks.
Sensor networks are ideal candidates for a wide range of applications, such as monitoring of critical infrastructures. Stabilization, safety, and security of distributed systems pp 335349. Time synchronization is critical in sensor networks at many layers of its design. Lightweight secure global time synchronization for.
Time synchronization for predictable and secure data collection in wireless sensor networks shujuan chen, adam dunkels, fredrik osterlind, thiemo voigt. Time synchronization is a fundamental requirement for the wide spectrum of applications with wireless sensor networks wsns. The collaborative execution is realized by exchanging messages that are time stamped using the local clocks on the nodes. Cao, attackresilient time synchronization for wireless sensor networks, in. Time synchronization and event time correlation are important in wireless sensor networks.
This paper contains a survey, relative study and analysis of existing time synchronization protocols for wireless sensor networks, based on various parameters. Secure localization and time synchronization for wireless sensor and ad hoc networks presents the latest research results in the area of secure localization and time synchronization for both wireless. Clock synchronization for wireless sensor networks. Advancedlevel students in computer science, especially in the area of wireless systems and security, will undoubtedly find this an invaluable reference tool. Wireless sensor networks wsns consist of small sensor nodes with limited energy. They are one of the most rapidly developing information technologies, with applications in a wide range of fields including industrial process control, security and surveillance, environmental sensing, and structural health monitoring.
The sensor clock has a counter that is incremented at rate f where f is the frequency of the oscillation. Abstract time synchronization is essential in wireless sensor networks as it is needed by many of the applications for basic communication. A wireless network can save energy with this feature, but if this synchronization is corrupted, it could cause a worse behavior. Such nodes have the ability to monitor the physical conditions and communicate information among the nodes without the requirement of the physical medium. There are various applications where secure time synchronization in wireless sensor networks is required. Time synchronization attacks in sensor networks 327 2. Almost any form of sensor data fusion or coordinated actuation requires synchronized physical time.
Distinguished from other books, it focuses on the networking aspects of wsns and covers the most important networking issues, including network architecture design, medium access control, routing and data dissemination, node clustering, node localization, query processing, data aggregation, transport and quality of service, time synchronization. Time synchronization is a critical piece of infrastructure in any distributed system, but wireless sensor networks make particularly extensive use of synchronized time. In this article, we analyze attacks on existing time synchronization protocols for wireless sensor networks and we propose a secure time synchronization toolbox. We then present the challenges and requirements to secure time synchronization and summarize the recent progress on secure time synchronization in wireless sensor networks. Secure time synchronization is a paramount service for wireless sensor networks wsns constituted by multiple interconnected body area networks bans. Stabilizing clock synchronization for wireless sensor networks. Secure time synchronization for wireless sensor networks. Firstly, we will analyze which are the most important time synchronization issues. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Part iii is on data storage and manipulation in sensor networks, and part iv deals with security protocols and mechanisms for wireless sensor networks. Algorithms and architectures tackles important challenges and presents the latest trends and. Time synchronization aims at equalizing the local times for all nodes in the network, if necessary. Secure precise clock synchronization for interconnected. The recently developed averageconsensusbased time synchronization protocol ats is a promising alternative as it does not depend on any reference node or network topology, which makes it robust to.
Advancedlevel students in computer science, especially in the area of wireless systems and security. For sensor networks deployed in hostile environments, security is critical to the success of time synchronization. Our protocol is designed to support timestamps in any. Due to the collaborative nature of sensor nodes, time synchronization is critical for many sensor network operations. A collaborative wireless sensor network wsn may require synchronization among a group of sensors. Time synchronization is critical for wireless sensors networks in industrial automation, e. Wireless sensor networks are used to monitor wine production, both in the field and the cellar. Time synchronization is an important issue in multihop ad hoc wireless networks such as sensor networks. It is important and challenging to achieve secure time synchronization in wireless sensor networks, which may be deployed in a hostile environment under various malicious attacks. Securing timing synchronization in sensor networks springerlink. Existing secure time synchronization protocols of wsns introduce high overhead when used for global time synchronization. It enables better dutycycling of the radio, accurate and secure localization, beamforming and other collaborative signal processing. Security in wireless ad hoc and sensor networks book.
Pdf clock synchronization of wireless sensor networks. Secure and selfstabilizing clock synchronization in sensor. In this paper we suggest a protocol for secure data distribution in a oneway communication scenario aimed at time distribution for sensor networks. Time synchronization for predictable and secure data. Multiple time stamping at sender and receiver for each packet to mitigate processing time jitter. Existing secure time synchronization protocols of wsns. Security in time synchronization for wireless sensor networks. Secure networkwide clock synchronization in wireless. Time synchronization is essential in wireless sensor networks as it is needed by many applications for basic communication. Secure time synchronization against malicious attacks for. Secure time synchronization protocols for wireless sensor networks. The counter counts time steps, and the length of these time. A secure time synchronization protocol for sensor network. Secure localization and time synchronization for wireless.
In particular, time is used to create a sequence events or time line to answer questions of cause and effect. Time synchronization in wireless sensor networks guide books. Secure and resilient time synchronization in wireless. Algorithms and protocols for wireless sensor networks wiley. Nodeidentificationbased secure time synchronization in. Any security mechanism for wireless sensor network wsn should also be time synchronized. Secure and efficient time synchronization in heterogeneous.
However, most existing time synchronization protocols are likely to deteriorate or even to be destroyed when the wsns are attacked by malicious intruders. Although several protocols to achieve clock synchronization have been developed, they may not be secure. A nodeidentificationbased secure time synchronization nists protocol is proposed. In this chapter, we present the clock model for time synchronization, and briefly introduce the insecure time synchronization techniques in wireless sensor networks. Clock synchronization is a critical issue in most wireless sensor network applications. Security in distributed sensor network time synchronization services f hu et al.
Pdf time synchronization for mobile wireless sensor network. Securing wireless networks using device type identification c corbett et al. Time synchronization in wireless sensor networks, smart wireless sensor networks, hoang duc chinh and yen kheng tan, intechopen, doi. Secure pairwise broadcast time synchronization in wireless. Many applications of sensor networks need local clocks of sensor nodes to be synchronized. Secure time synchronization in sensor networks acm. An accurate ondemand time synchronization protocol for. Time synchronization assures that all the sensor nodes in wireless sensor network have the same clock time. For years, protocols such as network time protocol ntp have kept the clocks of networked systems in perfect synchronization. The inherent characteristics of sensor networks do not permit simply applying traditional time synchronization algorithms.
The distributed wireless sensor networks heavily depends on the time synchronization for various reasons such as determining location and proximity of the deployed sensor nodes, intranetwork coordination among different sensor. Secure time synchronization due to the collaborative nature of sensor nodes, time synchronization is very important for many sensor network operations, such as coordinated sensing tasks, sensor scheduling sleep and wake, mobile object tracking, time. However, wireless sensor networks has a large density of nodes and very. Secure pairwise broadcast time synchronization in wireless sensor. This book presents the latest research results in the area of secure localization for both. Part of the lecture notes in computer science book series lncs, volume 4280. Time synchronization is essential in sensor networks, which collect data from a. In this paper, we analyze attacks on existing time synchronization protocols for wireless sensor networks.
Most wireless sensor network wsn applications require a synchronized local clock in sensor nodes. Secure localization and time synchronization for wireless sensor and ad hoc networks is designed for researchers, developers and practitioners in the area of secure wireless systems. Mar 26, 2008 a onestop resource for the use of algorithms and protocols in wireless sensor networks from an established international researcher in the field, this edited volume provides readers with comprehensive coverage of the fundamental algorithms and protocols for wireless sensor networks. Tinysersync is a software package providing both secure singlehop pairwise time synchronization and secure and resilient global timesynchronization on micaz motes running tinyos. Secure averageconsensusbased time synchronization in. Wireless sensor node or manet devices need to know the networks location or its relative location, with respect to the rest of the.
The synchronization problem consists of four parts. As time synchronization has got so many applications in sensor networks and performing many tasks in sensor networks requires time synchronization. Secure localization and time synchronization for wireless sensor and ad hoc networks advances in information security pdf,, download. One promising approach to achieve time synchronization in wsn, with significantly reduced energy consumption, is the receiveronly synchronization. Sep 02, 2005 the state of the art of sensor networks written by an international team of recognized experts in sensor networks from prestigious organizations such as motorola, fujitsu, the massachusetts institute of technology, cornell university, and the university of illinois, handbook of sensor networks. Leping huang and others secure time synchronization time synchronization attacks in sensor networks \ tanya roosta, mike manzo, and shankar sastry secure and resilient time synchronization in wireless sensor networks. Wireless sensor networks can be used to monitor the condition of civil infrastructure and related geophysical processes close to real time, and over long periods through data logging, using appropriately interfaced sensors. Pdf wireless sensor networks wsn are emerging as a valuable tool in many fields of science and industry. A secure and global time synchronization algorithm in. In sensor networks, correct clocks have arbitrary starting offsets and nondeterministic fluctuating skews. Security in distributed and networking systems computer and.
One promising approach to achieve time synchronization. Highlights we propose an ondemand time synchronization protocol aotsp for wireless sensor networks. Consensus clock synchronization for wireless sensor networks. A nodeidentificationbased secure time synchronization. Secure and resilient time synchronization for wireless sensor networks version 0.
Secure localization and time synchronization for wireless sensor and ad hoc networks advances in information security radha poovendran, cliff. Security to wireless sensor networks against malicious. Pairwise time synchronization algorithm is extremely simple and computationally efficient and used to synchronize any pair of static sensor nodes, and consider one of the nodes as a reference node. This book presents the latest research results in the area of secure localization for both wireless mobile ad hoc networks and wireless sensor networks. For example, mac layer protocols such as tdma 5 require time synchronization to schedule collisionfree broadcast schedules. The existing time synchronization schemes in sensor networks were not designed with security in mind, thus leaving them vulnerable to security attacks. Time synchronization is crucial for wireless sensor networks wsns and secure time synchronization is a key requirement for many sophisticated applications running on these networks. Time synchronization is an important component of sensor networks to provide a common clock time in sensor nodes.
This paper presents secure method of time synchronization. Security attacks and its countermeasures in wireless. Secure localization and time synchronization for wireless sensor. Aotsp has nanosecondorder accuracy, which is much better than the same type algorithms. Time synchronization in wireless sensor networks intechopen. It is suitable as a text for computer science courses in wireless systems and security. The applications envisioned for such networks require collaborative execution of a distributed task amongst a large set of sensor nodes.
It includes implementation studies with mica2 mote sensors. Time synchronization protocols provide a mechanism for synchronizing the local clocks of the nodes in a sensor network. Then, a secure time synchronization method will be presented for groupbased wireless sensor networks. Principles and practice addresses everything product developers and technicians need to know to navigate the field. Secure time synchronization in wirelesssensor networks. This protocol was developed due to the need to develop a more suitable time synchronization method that avoids round trip time. Secure time synchronization service for sensor networks. Security for wireless sensor networks provides a detailed overview of wireless sensor security issues, describing techniques for protecting networks and the results of recent studies in wireless sensor network security. Secure time synchronization protocols for wireless sensor. The recently developed averageconsensusbased time synchronization protocol ats. These benefits make timesynchronization protocols a prime target of malicious adversaries who want to disrupt the normal operation of a sensor network. Dec 22, 2005 wireless sensor networks promise an unprecedented finegrained interface between the virtual and physical worlds. Time synchronization is crucial to wireless sensor networks wsns due to the requirement of coordination between sensor nodes. This helps to achieve a common notion of time in wireless sensor networks.