03-06-2012, 10:37 PM
pls send abstract paper for this topic...
03-06-2012, 10:37 PM
pls send abstract paper for this topic...
04-06-2012, 10:13 AM
to get information about the topic packet hiding methods for preventing selective jamming attacks related topic refer the link bellow https://seminarproject.net/Thread-packet...ng-attacks
15-06-2013, 03:15 PM
Packet Hiding Methods for Preventing Selective Jamming Attacks
Packet Hiding.pptx (Size: 169.94 KB / Downloads: 31) ABSTRACT In this work, we address the problem of selective jamming attacks in wireless networks. In these attacks, the adversary is active only for a short period of time, selectively targeting messages of high importance. We illustrate the advantages of selective jamming in terms of network performance degradation and adversary effort by presenting two case studies; a selective attack on TCP and one on routing. We show that selective jamming attacks can be launched by performing real-time packet classification at the physical layer. To mitigate these attacks, we develop three schemes that prevent real-time packet classification by combining cryptographic primitives with physical-layer attributes. We analyze the security of our methods and evaluate their computational and communication overhead. AIM To show that selective jamming attacks can be launched by performing real time packet classification at the physical layer. To mitigate these attacks develop a schemes that prevent real-time packet classification by combining cryptographic primitives with physical layer attributes. SYNOPSIS To address the problem of jamming under an internal threat model and consider a sophisticated adversary who is aware of network secrets and the implementation details of network protocols at any layer in the network stack. The adversary exploits his internal knowledge for launching selective jamming attacks in which specific messages of high importance are targeted. For example, a jammer can target route-request/route-reply messages at the routing layer to prevent route discovery, or target TCP acknowledgments in a TCP session to severely degrade the throughput of an end-to-end flow. EXISTING SYTEM Conventional anti-jamming techniques rely extensively on spread-spectrum (SS) communications or some form of jamming evasion (e.g., slow frequency hopping, or spatial retreats). SS techniques provide bit-level protection by spreading bits according to a secret pseudo-noise (PN) code, known only to the communicating parties. These methods can only protect wireless transmissions under the external threat model. PROPOSED SYSTEM An intuitive solution to selective jamming would be the encryption of transmitted packets (including headers) with a static key. However, for broadcast communications, this static decryption key must be known to all intended receivers and hence, is susceptible to compromise. Moreover, even if the encryption key of a hiding scheme were to remain secret, the static portions of a transmitted packet could potentially lead to packet classification. MODULES Real Time Packet Classification A Strong Hiding Commitment Scheme Cryptographic Puzzle Hiding Scheme Hiding based on All-Or-Nothing Transformations Real Time Packet Classification: At the Physical layer, a packet m is encoded, interleaved, and modulated before it is transmitted over the wireless channel. At the receiver, the signal is demodulated, deinterleaved and decoded to recover the original packet m. Nodes A and B communicate via a wireless link. Within the communication range of both A and B there is a jamming node J. When A transmits a packet m to B, node J classifies m by receiving only the first few bytes of m. J then corrupts m beyond recovery by interfering with its reception at B. A Strong Hiding Commitment Scheme A strong hiding commitment scheme (SHCS), which is based on symmetric cryptography. Assume that the sender has a packet for Receiver. First, S constructs commit( message ) the commitment function is an off-the-shelf symmetric encryption algorithm is a publicly known permutation, and k is a randomly selected key of some desired key length s (the length of k is a security parameter). Upon reception of d, any receiver R computes. CONCLUSION: We evaluated the impact of selective jamming attacks on network protocols such as TCP and routing. Our findings show that a selective jammer can significantly impact performance with very low effort. We developed three schemes that transform a selective jammer to a random one by preventing real-time packet classification. |
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