Generating quasi-random sequences from semi-random sources
Journal of Computer and System Sciences
An optimal class of symmetric key generation systems
Proc. of the EUROCRYPT 84 workshop on Advances in cryptology: theory and application of cryptographic techniques
Pseudo-random generation from one-way functions
STOC '89 Proceedings of the twenty-first annual ACM symposium on Theory of computing
A key-management scheme for distributed sensor networks
Proceedings of the 9th ACM conference on Computer and communications security
Perfectly-Secure Key Distribution for Dynamic Conferences
CRYPTO '92 Proceedings of the 12th Annual International Cryptology Conference on Advances in Cryptology
Unconditional Security Against Memory-Bounded Adversaries
CRYPTO '97 Proceedings of the 17th Annual International Cryptology Conference on Advances in Cryptology
Random Key Predistribution Schemes for Sensor Networks
SP '03 Proceedings of the 2003 IEEE Symposium on Security and Privacy
Combinatorial design of key distribution mechanisms for wireless sensor networks
IEEE/ACM Transactions on Networking (TON)
AVBPA'03 Proceedings of the 4th international conference on Audio- and video-based biometric person authentication
New shielding functions to enhance privacy and prevent misuse of biometric templates
AVBPA'03 Proceedings of the 4th international conference on Audio- and video-based biometric person authentication
Entropic security and the encryption of high entropy messages
TCC'05 Proceedings of the Second international conference on Theory of Cryptography
CRYPTO'05 Proceedings of the 25th annual international conference on Advances in Cryptology
Unconditionally secure key agreement and the intrinsic conditional information
IEEE Transactions on Information Theory
Everlasting security in the bounded storage model
IEEE Transactions on Information Theory
Advancing wireless link signatures for location distinction
Proceedings of the 14th ACM international conference on Mobile computing and networking
Radio-telepathy: extracting a secret key from an unauthenticated wireless channel
Proceedings of the 14th ACM international conference on Mobile computing and networking
Standards for security associations in personal networks: a comparative analysis
International Journal of Security and Networks
Jamming for good: a fresh approach to authentic communication in WSNs
Proceedings of the second ACM conference on Wireless network security
Denial-of-Service attacks and countermeasures in IEEE 802.11 wireless networks
Computer Standards & Interfaces
On the effectiveness of secret key extraction from wireless signal strength in real environments
Proceedings of the 15th annual international conference on Mobile computing and networking
Information Theoretic Security
Foundations and Trends in Communications and Information Theory
EURASIP Journal on Wireless Communications and Networking - Special issue on wireless physical layer security
Secret keys from entangled sensor motes: implementation and analysis
Proceedings of the third ACM conference on Wireless network security
An adaptive quantization algorithm for secret key generation using radio channel measurements
NTMS'09 Proceedings of the 3rd international conference on New technologies, mobility and security
Robust uncorrelated bit extraction methodologies for wireless sensors
Proceedings of the 9th ACM/IEEE International Conference on Information Processing in Sensor Networks
A note on information-theoretic secret key exchange over wireless channels
Allerton'09 Proceedings of the 47th annual Allerton conference on Communication, control, and computing
Information-theoretically secret key generation for fading wireless channels
IEEE Transactions on Information Forensics and Security
Secure wireless communication with dynamic secrets
INFOCOM'10 Proceedings of the 29th conference on Information communications
Exploiting multiple-antenna diversity for shared secret key generation in wireless networks
INFOCOM'10 Proceedings of the 29th conference on Information communications
Secret key extraction in MIMO-like sensor networks using wireless signal strength
ACM SIGMOBILE Mobile Computing and Communications Review
AmbiSec: securing smart spaces using entropy harvesting
AmI'10 Proceedings of the First international joint conference on Ambient intelligence
SeCA: A framework for Secure Channel Assignment in wireless mesh networks
Computer Communications
Vulnerabilities of wireless key exchange based on channel reciprocity
WISA'10 Proceedings of the 11th international conference on Information security applications
On passive inference attacks against physical-layer key extraction?
Proceedings of the Fourth European Workshop on System Security
ProxiMate: proximity-based secure pairing using ambient wireless signals
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
Zero reconciliation secret key generation for body-worn health monitoring devices
Proceedings of the fifth ACM conference on Security and Privacy in Wireless and Mobile Networks
Creating shared secrets out of thin air
Proceedings of the 11th ACM Workshop on Hot Topics in Networks
Limitations of generating a secret key using wireless fading under active adversary
IEEE/ACM Transactions on Networking (TON)
Creating secrets out of erasures
Proceedings of the 19th annual international conference on Mobile computing & networking
Multi-user wireless channel probing for shared key generation with a fuzzy controller
Computer Networks: The International Journal of Computer and Telecommunications Networking
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The broadcast nature of a wireless link provides a natural eavesdropping and intervention capability to an adversary. Thus, securing a wireless link is essential to the security of a wireless network, and key generation algorithms are necessary for securing wireless links. However, traditional key agreement algorithms can be very costly in many settings, e.g. in wireless ad-hoc networks, since they consume scarce resources such as bandwidth and battery power. Traditional key agreement algorithms are not suitable for wireless ad-hoc networks since they consume scarce resources such as bandwidth and battery power. This paper presents a novel approach that couples the physical layer characteristics of wireless networks with key generation algorithms. It is based on the wireless communication phenomenon known as the principle of reciprocity which states that in the absence of interference both transmitter and receiver experience the same signal envelope. The key-observation here is that the signal envelope information can provide to the two transceivers two correlated random sources that provide sufficient amounts of entropy which can be used to extract a cryptographic key. In contrast, it is virtually impossible for a third party, which is not located at one of the transceiver's position, to obtain or predict the exact envelope; thus retrieve the key. Since in the presence of interference strict reciprocity property can not be maintained; our methodology is based on detecting deep fades to extract correlated bitstrings. In particular, we show how a pair of transceivers can reconcile such bitstrings and finally flatten their distribution to reach key agreement. In our constructions we use cryptographic tools related to randomness extraction and information reconciliation. We introduce "secure fuzzy information reconciliators" a tool that enables us to describe robust key generation systems in our setting. Finally we provide a computational study that presents a simulation of a wireless channel that demonstrates the feasibility of our approach and justifies the assumptions made in our analysis.