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ZDNet Dictionary Definition
- Anomaly
- Abnormality or deviation. Pronounced "uh-nom-uh-lee," it is a favorite word among computer people when complex systems produce output that is inexplicable. See software conflict and anomaly detection.
- Full Anomaly Definition >>
ZDNet Resources
- How OpenDNS, PowerDNS and MaraDNS remained unaffected by the DNS cache poisoning vulnerability
- The short answer is being paranoid about tackling a known vulnerability. It's 2001, and Daniel J. Bernstein DJB, author of the then popular djbdns security-aware DNS implementation, is applying basic math principles to raise awareness on what's to turn into the "sky is falling" critical Internet vulnerability in 2008, in...
- Tags: DNS, Vulnerability, Anomaly, Attack, OpenDNS, MaraDNS, NSS, Domain Names, Networking, Internet, Dancho Danchev
- Blog posts 2008-07-25
- IDGraphs: Intrusion Detection and Analysis Using Histographs
- Traffic anomalies and attacks are commonplace in today's networks and identifying them rapidly and accurately is critical for large network operators. For a statistical Intrusion Detection System IDS, it is crucial to detect at the flow-level for accurate detection and mitigation. However, existing IDS systems offer only limited support for...
- Tags: Network, Northwestern University, Intrusion Detection System, Analysis, Anomaly, IDGraphs, Intrusion Detection, Network Security, Security, Networking
- White papers 2008-01-01
- Bayesian Event Classification for Intrusion Detection
- Intrusion Detection Systems IDSs attempt to identify attacks by comparing collected data to predefined signatures known to be malicious (misuse-based IDSs) or to a model of legal behavior (anomaly-based IDSs). Anomaly-based approaches have the advantage of being able to detect previously unknown attacks, but they suffer from the difficulty of...
- Tags: Bayesian, Intrusion Detection System, Anomaly, Intrusion Detection, Network Security, Security, Networking
- White papers 2008-01-01
- ATLANTIDES: An Architecture for Alert Verification in Network Intrusion Detection Systems
- This paper presents an architecture1 designed for alert verification (i.e., to reduce false positives) in network intrusion-detection systems. The technique in this paper is based on a systematic and automatic anomaly-based analysis of the system output, which provides useful context information regarding the network services. The false positives raised by...
- Tags: Network Intrusion Detection System, Network, Network Service, Intrusion Detection System, Anomaly, University Of Twente, Intrusion Detection, Network Security, Networking, Security
- White papers 2007-09-19
- Compatibility Is Not Transparency: VMM Detection Myths and Realities
- Recent work on applications ranging from realistic honeypots to stealthier rootkits has speculated about building transparent VMMs - VMMs that are indistinguishable from native hardware, even to a dedicated adversary. This paper surveys anomalies between real and virtual hardware and consider methods for detecting such anomalies, as well as possible...
- Tags: Carnegie-Mellon University, Hardware, Anomaly, Rootkits, Security, Spyware, Adware & Malware
- White papers 2007-04-12
- A Bayesian Networks in Intrusion Detection Systems
- Intrusion Detection Systems IDSs have been widely used to overcome security threats in computer networks. Anomaly-based approaches have the advantage of being able to detect previously unknown attacks, but they suffer from the difficulty of building robust models of acceptable behaviour which may result in a large number of false...
- Tags: Bayesian, Intrusion Detection System, Anomaly, Science Publications, Intrusion Detection, Network Security, Security, Networking
- White papers 2007-04-11
- TCP Anomalies: Identification and Analysis
- Passive measurements have recently received large attention from the scientific community as a mean, not only for traffic characterization, but also to infer critical protocol behaviors and network working conditions. This paper focuses on passive measurements of TCP traffic, main component of traffic. In particular, it proposes a heuristic technique...
- Tags: TCP, Analysis, Anomaly, Tcp/Ip, Networking
- White papers 2007-01-01
- State Dept. probing computer 'anomalies'
- State Dept. probing computer 'anomalies'Gee, what a surprise - NOT !The blind leading the clueless.Carry on.Unclassified?What exactly qualifies as "unclassified" anyway? ... especially if it's worth detecting a breech. Blind and clueless indeed.Don't probe the anomalies too hardthose Zdnet posters are a bit basement fragile. ;)No kiddingI totally...
- Tags: Government, Vertical industries, PRODUCTIVITY, SECURITY, computer, anomaly
- Discussion threads 2006-07-11
- Passive Identification and Analysis of TCP Anomalies
- This paper focuses on passive measurements of TCP traffic, main component of traffic. It proposes a heuristic technique for the classification of the anomalies that may occur during the lifetime of a TCP flow, such as out-of-sequence and duplicate segments. Since TCP is a closed-loop protocol that infers network conditions...
- Tags: TCP, Analysis, Anomaly, Tcp/Ip, Networking
- White papers 2006-05-03
- Firewall Rules Analysis
- This paper proposes a method to analyze the firewall policy or rule-set using Relational Algebra and Raining 2D-Box Model. It can discover all the anomalies in the firewall rule-set in the format that is usually used by many firewall products such as Cisco Access Control List, IPTABLES, IPCHAINS and Check...
- Tags: Analysis, Anomaly, Firewalls, Network Security, Security, Networking
- White papers 2006-05-02
- POSEIDON: A 2-Tier Anomaly-Based Network Intrusion Detection System
- Intrusion Detection Systems IDSs were introduced by Anderson and formalized later by Denning. Nowadays, there exist two main types of network intrusion detection methods: anomaly-based and signature-based. In signature-based methods, a characteristic trait of the intrusion is developed off-line, and then loaded in the intrusion database before the system can...
- Tags: Network Intrusion Detection System, Network, Intrusion Detection System, Network Intrusion Detection, Anomaly, POSEIDON, Intrusion Detection, Network Security, Security, Networking
- White papers 2006-04-01
- Resolving 802.11 Performance Anomalies Through QoS Differentiation
- It was recently shown that 802.11b MAC has an "Anomaly" that the throughput of high bit-rate terminals in good channel condition is down-equalized to that of the lowest bit-rate peer in the network. This paper analytically proves that the phenomenon can be cleanly resolved through configuring the initial contention window...
- Tags: Terminal, IEEE 802.11, QoS, Performance, IEEE, Anomaly, Wireless LANs, Wi-Fi, Wireless
- White papers 2005-06-01
- Eliminating the Performance Anomaly of 802.11b
- This paper proposes a mechanism to eliminate the performance anomaly of IEEE 802.11b. Performance anomaly happens when nodes that have different transmission rates are in the same wireless cell. All the nodes in the cell might experience the same throughput even though their transmission rates are different because DCF of...
- Tags: IEEE 802.11, Performance, Anomaly, Performance Anomaly, Performance Management, Wi-Fi, Wireless, Human Resources, Workforce Management
- White papers 2004-12-03
- Unreal Tournament 2004 Anomaly mod (exe)
- Anomaly is a futuristic racing mod for Unreal Tournament 2004. With this mod you can race high speed hovercrafts on various custom speedways. You can customize your hovercraft with various weapons and power ups to give you an edge on the competition. Version 0.6 makes several bug fixes to improve...
- Tags: Anomaly
- Software downloads 2004-10-12
- Deciphering Meaning From Early RFID Signals
- Many companies in the consumer goods, retail and pharmaceutical markets have moved into the next phases of their RFID initiatives. This phase involves collecting data being generated from across the supply chain as tagged products move past RFID readers. As supply chain executives begin to investigate this data, they typically...
- Tags: Supply Chain, Anomaly, RFID, Supply Chain Management (SCM), Wireless, Security, Biometrics, Enterprise Software, Software
- Webcasts
Additional Resources
- The evolution of search over traditional BI
- Today's business intelligence tools are great at tracking tradional numbers but fail to quench business's thirst for more information says Commentary--A recent Gartner report predicts that IT’s involvement in business intelligence BI will diminish in time as business users adopt new technologies to quench...
- Tags: Payment, Data, Analyst, Information, Pricing, Tools & Techniques, Databases, Enterprise Software, Marketing, Software, Data Management, Management, business intelligence, search, Sid Probstein, Attivio
- News items 2008-07-22
- My Awesome IT Job: Senior security engineer, VoIP carrier
- Hey, we all complain about work from time to time; we've all had lousy jobs. But before you call it a day and head off to the support group that meets at the bar, here are a few words from IT pros that love their work. "I...
- Tags: Network, Information Technology, Hobby, Telephony, VOIP, Telecommunications, Security, Networking, Deb Perelman
- Blog posts 2008-07-18
- MARS - Cisco Security Monitoring, Analysis, and Response System v3.0
- Instantly save $400 off the standard course price when you register on TechRepublic or ZDNet! Offer ends August 22, 2008.View Available Dates and LocationsCisco Security Monitoring, Analysis, and Response System MARS is a family of high-performance, scalable appliances for threat management, monitoring, and mitigation that enables you to...
- Tags: Appliance, Network, Security Monitoring, Monitoring, Cisco Systems Inc., Analysis, Configure, Networking
- Training 2008-06-01
- MacBook Err
- MacBook Errcaption"This one goes to 11. 12. 13. 14..."Suggestion for a new function key....F-off :-)RE: MacBook ErrAs much as I like reading this blog, I sometimes think that some entries would be better not being written. Beside the second key would obviously lower down the volume (unlike what...
- Tags: Keyboards, Notebooks, F11, Nigel Tufnel, Spinal Tap, keyboard, Apple MacBook, St. Hubbins, Derek Smalls, heavy metal band, World-famous, metal band
- Discussion threads 2008-05-20
- CAMNEP: Agent-Based Network Intrusion Detection System
- This paper presents a prototype of agent-based intrusion detection system designed for deployment on high-speed backbone networks. The main contribution of the system is the integration of several anomaly detection techniques by means of collective trust modeling within a group of collaborative detection agents, each featuring a specific detection algorithm....
- Tags: Network Intrusion Detection System, Network, Agent, Intrusion Detection System, IFAAMAS, Real Estate, Research & Development, Intrusion Detection, Networking, Security, Business Operations
- White papers 2008-05-16
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White Papers and Webcasts
In this Super Techies interview, larger-than-life techie Marc Canter talks with ZDNet's Editor in Chief Dan Farber about his career as a multimedia pioneer.
