The Experts below are selected from a list of 2799 Experts worldwide ranked by ideXlab platform
Alex J Halderman - One of the best experts on this subject based on the ideXlab platform.
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zippier zmap internet wide scanning at 10 gbps
WOOT'14 Proceedings of the 8th USENIX conference on Offensive Technologies, 2014Co-Authors: David Adrian, Zakir Durumeric, Gulshan Singh, Alex J HaldermanAbstract:We introduce optimizations to the ZMap network scanner that achieve a 10-fold increase in maximum scan rate. By parallelizing address generation, introducing an improved blacklisting algorithm, and using zero-copy NIC access, we drive ZMap to nearly the maximum throughput of 10 gigabit Ethernet, almost 15 million probes per second. With these changes, ZMap can comprehensively scan for a single TCP port across the entire public IPv4 address space in 4.5 minutes given adequate Upstream Bandwidth. We consider the implications of such rapid scanning for both defenders and attackers, and we briefly discuss a range of potential applications.
David Adrian - One of the best experts on this subject based on the ideXlab platform.
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zippier zmap internet wide scanning at 10 gbps
WOOT'14 Proceedings of the 8th USENIX conference on Offensive Technologies, 2014Co-Authors: David Adrian, Zakir Durumeric, Gulshan Singh, Alex J HaldermanAbstract:We introduce optimizations to the ZMap network scanner that achieve a 10-fold increase in maximum scan rate. By parallelizing address generation, introducing an improved blacklisting algorithm, and using zero-copy NIC access, we drive ZMap to nearly the maximum throughput of 10 gigabit Ethernet, almost 15 million probes per second. With these changes, ZMap can comprehensively scan for a single TCP port across the entire public IPv4 address space in 4.5 minutes given adequate Upstream Bandwidth. We consider the implications of such rapid scanning for both defenders and attackers, and we briefly discuss a range of potential applications.
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WOOT - Zippier ZMap: internet-wide scanning at 10 Gbps
2014Co-Authors: David Adrian, Zakir Durumeric, Gulshan Singh, J. Alex HaldermanAbstract:We introduce optimizations to the ZMap network scanner that achieve a 10-fold increase in maximum scan rate. By parallelizing address generation, introducing an improved blacklisting algorithm, and using zero-copy NIC access, we drive ZMap to nearly the maximum throughput of 10 gigabit Ethernet, almost 15 million probes per second. With these changes, ZMap can comprehensively scan for a single TCP port across the entire public IPv4 address space in 4.5 minutes given adequate Upstream Bandwidth. We consider the implications of such rapid scanning for both defenders and attackers, and we briefly discuss a range of potential applications.
Zakir Durumeric - One of the best experts on this subject based on the ideXlab platform.
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zippier zmap internet wide scanning at 10 gbps
WOOT'14 Proceedings of the 8th USENIX conference on Offensive Technologies, 2014Co-Authors: David Adrian, Zakir Durumeric, Gulshan Singh, Alex J HaldermanAbstract:We introduce optimizations to the ZMap network scanner that achieve a 10-fold increase in maximum scan rate. By parallelizing address generation, introducing an improved blacklisting algorithm, and using zero-copy NIC access, we drive ZMap to nearly the maximum throughput of 10 gigabit Ethernet, almost 15 million probes per second. With these changes, ZMap can comprehensively scan for a single TCP port across the entire public IPv4 address space in 4.5 minutes given adequate Upstream Bandwidth. We consider the implications of such rapid scanning for both defenders and attackers, and we briefly discuss a range of potential applications.
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WOOT - Zippier ZMap: internet-wide scanning at 10 Gbps
2014Co-Authors: David Adrian, Zakir Durumeric, Gulshan Singh, J. Alex HaldermanAbstract:We introduce optimizations to the ZMap network scanner that achieve a 10-fold increase in maximum scan rate. By parallelizing address generation, introducing an improved blacklisting algorithm, and using zero-copy NIC access, we drive ZMap to nearly the maximum throughput of 10 gigabit Ethernet, almost 15 million probes per second. With these changes, ZMap can comprehensively scan for a single TCP port across the entire public IPv4 address space in 4.5 minutes given adequate Upstream Bandwidth. We consider the implications of such rapid scanning for both defenders and attackers, and we briefly discuss a range of potential applications.
Gulshan Singh - One of the best experts on this subject based on the ideXlab platform.
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zippier zmap internet wide scanning at 10 gbps
WOOT'14 Proceedings of the 8th USENIX conference on Offensive Technologies, 2014Co-Authors: David Adrian, Zakir Durumeric, Gulshan Singh, Alex J HaldermanAbstract:We introduce optimizations to the ZMap network scanner that achieve a 10-fold increase in maximum scan rate. By parallelizing address generation, introducing an improved blacklisting algorithm, and using zero-copy NIC access, we drive ZMap to nearly the maximum throughput of 10 gigabit Ethernet, almost 15 million probes per second. With these changes, ZMap can comprehensively scan for a single TCP port across the entire public IPv4 address space in 4.5 minutes given adequate Upstream Bandwidth. We consider the implications of such rapid scanning for both defenders and attackers, and we briefly discuss a range of potential applications.
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WOOT - Zippier ZMap: internet-wide scanning at 10 Gbps
2014Co-Authors: David Adrian, Zakir Durumeric, Gulshan Singh, J. Alex HaldermanAbstract:We introduce optimizations to the ZMap network scanner that achieve a 10-fold increase in maximum scan rate. By parallelizing address generation, introducing an improved blacklisting algorithm, and using zero-copy NIC access, we drive ZMap to nearly the maximum throughput of 10 gigabit Ethernet, almost 15 million probes per second. With these changes, ZMap can comprehensively scan for a single TCP port across the entire public IPv4 address space in 4.5 minutes given adequate Upstream Bandwidth. We consider the implications of such rapid scanning for both defenders and attackers, and we briefly discuss a range of potential applications.
Youngil Park - One of the best experts on this subject based on the ideXlab platform.
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improvement of Upstream Bandwidth utilization using two Upstream wavelengths tdm pon system
The Journal of Korean Institute of Communications and Information Sciences, 2008Co-Authors: Junhoi Chung, Jaeuk Park, Byungchul Choi, Jeahoon Yoo, Byoungwhi Kim, Youngil ParkAbstract:Upstream data frame of TDM-PON includes various types of overheads, and there exist guard bands between consecutive frames from different ONUs. Although they are indispensible in synchronization and performance, they cause Bandwidth waste at the same time. To solve this problem, a new TDM-PON that uses two types of wavelengths in Upstream transmission is suggested. By even distribution of two wavelengths among ONUs and overhead overlap between frames that use different wavelengths, almost 100% Bandwidth efficiency could be achieved. A serializer that multiplexes signals from two wavelengths is implemented for this purpose.
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Application of 2W-PON in fairness and priority environments
Journal of Optical Networking, 2007Co-Authors: Jeauk Park, Junhoi Chung, Youngil ParkAbstract:Time division multiplexing-passive optical networks (TDM-PONs) suffer from low Upstream Bandwidth utilization caused by guard band and various overheads. This degradation depends on optical network unit (ONU) numbers and cycle time, each of which has many effects on cost and quality, respectively. Upstream Bandwidth utilization is efficiently increased by using two wavelength types at ONU sites so that overhead parts from two ONUs are overlapped in time. Each ONU is equipped with one of the two transmitting wavelengths, and an optical line terminal (OLT) schedules operation sequence. A utilization increase of up to 30% is achieved for gigabit Ethernet-passive optical network (GE-PON) by using the proposed scheme. Two operation algorithms, based on fairness and priority, are suggested and their performances are analyzed.
