The Experts below are selected from a list of 156 Experts worldwide ranked by ideXlab platform

J. Alex Halderman - One of the best experts on this subject based on the ideXlab platform.

  • WOOT - Zippier ZMap: internet-wide scanning at 10 Gbps
    2014
    Co-Authors: David Adrian, Zakir Durumeric, Gulshan Singh, J. Alex Halderman
    Abstract:

    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.

  • USENIX Security Symposium - ZMap: fast internet-wide scanning and its security applications
    2013
    Co-Authors: Zakir Durumeric, Eric Wustrow, J. Alex Halderman
    Abstract:

    Internet-wide Network scanning has numerous security applications, including exposing new vulnerabilities and tracking the adoption of defensive mechanisms, but probing the entire public address space with existing tools is both difficult and slow. We introduce ZMap, a modular, open-source Network Scanner specifically architected to perform Internet-wide scans and capable of surveying the entire IPv4 address space in under 45 minutes from user space on a single machine, approaching the theoretical maximum speed of gigabit Ethernet. We present the Scanner architecture, experimentally characterize its performance and accuracy, and explore the security implications of high speed Internet-scale Network surveys, both offensive and defensive. We also discuss best practices for good Internet citizenship when performing Internet-wide surveys, informed by our own experiences conducting a long-term research survey over the past year.

  • ZMap: Fast Internet-wide Scanning and Its Security Applications
    USENIX Security Symposium, 2013
    Co-Authors: Zakir Durumeric, Eric Wustrow, J. Alex Halderman
    Abstract:

    Internet-wide Network scanning has numerous security applications, including exposing new vulnerabilities and tracking the adoption of defensive mechanisms, but prob- ing the entire public address space with existing tools is both difficult and slow. We introduce ZMap, a modular, open-source Network Scanner specifically architected to perform Internet-wide scans and capable of surveying the entire IPv4 address space in under 45 minutes from user space on a single machine, approaching the theo- retical maximum speed of gigabit Ethernet. We present the Scanner architecture, experimentally characterize its performance and accuracy, and explore the security impli- cations of high speed Internet-scale Network surveys, both offensive and defensive. We also discuss best practices for good Internet citizenship when performing Internet-wide surveys, informed by our own experiences conducting a long-term research survey over the past year. 1

Zakir Durumeric - One of the best experts on this subject based on the ideXlab platform.

  • WOOT - Zippier ZMap: internet-wide scanning at 10 Gbps
    2014
    Co-Authors: David Adrian, Zakir Durumeric, Gulshan Singh, J. Alex Halderman
    Abstract:

    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.

  • zippier zmap internet wide scanning at 10 gbps
    WOOT'14 Proceedings of the 8th USENIX conference on Offensive Technologies, 2014
    Co-Authors: David Adrian, Zakir Durumeric, Gulshan Singh, Alex J Halderman
    Abstract:

    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.

  • USENIX Security Symposium - ZMap: fast internet-wide scanning and its security applications
    2013
    Co-Authors: Zakir Durumeric, Eric Wustrow, J. Alex Halderman
    Abstract:

    Internet-wide Network scanning has numerous security applications, including exposing new vulnerabilities and tracking the adoption of defensive mechanisms, but probing the entire public address space with existing tools is both difficult and slow. We introduce ZMap, a modular, open-source Network Scanner specifically architected to perform Internet-wide scans and capable of surveying the entire IPv4 address space in under 45 minutes from user space on a single machine, approaching the theoretical maximum speed of gigabit Ethernet. We present the Scanner architecture, experimentally characterize its performance and accuracy, and explore the security implications of high speed Internet-scale Network surveys, both offensive and defensive. We also discuss best practices for good Internet citizenship when performing Internet-wide surveys, informed by our own experiences conducting a long-term research survey over the past year.

  • ZMap: Fast Internet-wide Scanning and Its Security Applications
    USENIX Security Symposium, 2013
    Co-Authors: Zakir Durumeric, Eric Wustrow, J. Alex Halderman
    Abstract:

    Internet-wide Network scanning has numerous security applications, including exposing new vulnerabilities and tracking the adoption of defensive mechanisms, but prob- ing the entire public address space with existing tools is both difficult and slow. We introduce ZMap, a modular, open-source Network Scanner specifically architected to perform Internet-wide scans and capable of surveying the entire IPv4 address space in under 45 minutes from user space on a single machine, approaching the theo- retical maximum speed of gigabit Ethernet. We present the Scanner architecture, experimentally characterize its performance and accuracy, and explore the security impli- cations of high speed Internet-scale Network surveys, both offensive and defensive. We also discuss best practices for good Internet citizenship when performing Internet-wide surveys, informed by our own experiences conducting a long-term research survey over the past year. 1

Preben Mogensen - One of the best experts on this subject based on the ideXlab platform.

  • validation of large scale propagation characteristics for uavs within urban environment
    Vehicular Technology Conference, 2019
    Co-Authors: Madalina Bucur, Troels B Sorensen, Rafhael Amorim, Melisa Lopez, Istvan Z Kovacs, Preben Mogensen
    Abstract:

    Cellular Networks based on current LTE Advanced or coming 5G technology, constitute an attractive candidate to provide communication links for drones in low level airspace. This paper extends previous findings on path loss exponent and shadow fading variation for an urban environment, by adding new and more extensive empirical evidence. Specifically, by way of the measurements methodology we study also the spatial correlation of the shadow fading, including the lateral spatial autocorrelation (decorrelation distance) and the cross-correlation in shadowing variability between different heights. Data was obtained with the use of a drone flying at heights up to and above rooftop, using a radio Network Scanner measuring live LTE signals at 1800 MHz. The path loss analysis confirmed the validity of previously presented modelling frameworks for the behaviour versus height, as well as the characteristics of the increased interference observed when the drone if above rooftop level. As for the spatial correlation of the shadow fading, the results indicate that decorrelation distance does not change appreciably from ground level up to and above rooftop level, and remains in the order of 10 m. The shadow fading variability is generally uncorrelated versus height, although with a trend to be correlated below rooftop level, but not above.

  • VTC-Fall - Validation of Large-Scale Propagation Characteristics for UAVs within Urban Environment
    2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall), 2019
    Co-Authors: Madalina Bucur, Troels B Sorensen, Rafhael Amorim, Melisa Lopez, Istvan Z Kovacs, Preben Mogensen
    Abstract:

    Cellular Networks based on current LTE Advanced or coming 5G technology, constitute an attractive candidate to provide communication links for drones in low level airspace. This paper extends previous findings on path loss exponent and shadow fading variation for an urban environment, by adding new and more extensive empirical evidence. Specifically, by way of the measurements methodology we study also the spatial correlation of the shadow fading, including the lateral spatial autocorrelation (decorrelation distance) and the cross-correlation in shadowing variability between different heights. Data was obtained with the use of a drone flying at heights up to and above rooftop, using a radio Network Scanner measuring live LTE signals at 1800 MHz. The path loss analysis confirmed the validity of previously presented modelling frameworks for the behaviour versus height, as well as the characteristics of the increased interference observed when the drone if above rooftop level. As for the spatial correlation of the shadow fading, the results indicate that decorrelation distance does not change appreciably from ground level up to and above rooftop level, and remains in the order of 10 m. The shadow fading variability is generally uncorrelated versus height, although with a trend to be correlated below rooftop level, but not above.

  • WCNC - Verification of 3G and 4G received power measurements in a crowdsourcing Android app
    2016 IEEE Wireless Communications and Networking Conference, 2016
    Co-Authors: Mads Lauridsen, Ignacio Rodriguez, Lars Møller Mikkelsen, Lucas Chavarria Gimenez, Preben Mogensen
    Abstract:

    Many crowdsourcing Android applications are available for measuring Network Key Performance Indicators such as received power, latency, and throughput. The data is useful for end-users, researchers, and Mobile Network Operators, but unfortunately the applications' accuracy are rarely verified. In this paper we verify the crowdsourcing Android application NetMap's ability to measure LTE Reference Signal Received Power by analyzing the Root Mean Squared Error, being 2–3 dB, and cross-correlation coefficient, being above 0.8, with measurements obtained by use of a professional radio Network Scanner and measurement phones. In addition, the application is applicable, but less accurate, for 3G Received Signal Code Power measurements. The studies are made for various device speeds and in different scenarios including indoor, urban, and highway, where the NetMap application is showed to perform well.

Alex J Halderman - One of the best experts on this subject based on the ideXlab platform.

  • zippier zmap internet wide scanning at 10 gbps
    WOOT'14 Proceedings of the 8th USENIX conference on Offensive Technologies, 2014
    Co-Authors: David Adrian, Zakir Durumeric, Gulshan Singh, Alex J Halderman
    Abstract:

    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.

Eric Wustrow - One of the best experts on this subject based on the ideXlab platform.

  • USENIX Security Symposium - ZMap: fast internet-wide scanning and its security applications
    2013
    Co-Authors: Zakir Durumeric, Eric Wustrow, J. Alex Halderman
    Abstract:

    Internet-wide Network scanning has numerous security applications, including exposing new vulnerabilities and tracking the adoption of defensive mechanisms, but probing the entire public address space with existing tools is both difficult and slow. We introduce ZMap, a modular, open-source Network Scanner specifically architected to perform Internet-wide scans and capable of surveying the entire IPv4 address space in under 45 minutes from user space on a single machine, approaching the theoretical maximum speed of gigabit Ethernet. We present the Scanner architecture, experimentally characterize its performance and accuracy, and explore the security implications of high speed Internet-scale Network surveys, both offensive and defensive. We also discuss best practices for good Internet citizenship when performing Internet-wide surveys, informed by our own experiences conducting a long-term research survey over the past year.

  • ZMap: Fast Internet-wide Scanning and Its Security Applications
    USENIX Security Symposium, 2013
    Co-Authors: Zakir Durumeric, Eric Wustrow, J. Alex Halderman
    Abstract:

    Internet-wide Network scanning has numerous security applications, including exposing new vulnerabilities and tracking the adoption of defensive mechanisms, but prob- ing the entire public address space with existing tools is both difficult and slow. We introduce ZMap, a modular, open-source Network Scanner specifically architected to perform Internet-wide scans and capable of surveying the entire IPv4 address space in under 45 minutes from user space on a single machine, approaching the theo- retical maximum speed of gigabit Ethernet. We present the Scanner architecture, experimentally characterize its performance and accuracy, and explore the security impli- cations of high speed Internet-scale Network surveys, both offensive and defensive. We also discuss best practices for good Internet citizenship when performing Internet-wide surveys, informed by our own experiences conducting a long-term research survey over the past year. 1