Fareed Zaffar

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Previous distributed anomaly detection efforts have operated on summary statistics gathered from each node. This has the advantage that the audit trail is limited in size since event sets can be succinctly represented. While this minimizes the bandwidth consumed and helps scale the detection to a large number of nodes, it limits the infrastructure's ability(More)
The Paranoid file system is an encrypted, secure, global file system with user managed access control. The system provides efficient peer-to-peer application transparent file sharing. This paper presents the design, implementation and evaluation of the Paranoid file system and its access-control architecture. The system lets users grant safe, selective,(More)
Over the past few years, many black-hat marketplaces have emerged that facilitate access to reputation manipulation services such as fake Facebook likes, fraudulent search engine optimization (SEO), or bogus Amazon reviews. In order to deploy effective technical and legal countermeasures, it is important to understand how these black-hat marketplaces(More)
With the advent of big data, modern businesses face an increasing need to store and process large volumes of sensitive customer information on the cloud. In these environments, resources are shared across a multitude of mutually untrusting tenants increasing propensity for data leakage. This problem stands to grow further in severity with increasing use of(More)
Large data processing tasks can be effected using workflow management systems. When either the input data or the programs in the pipeline are modified, the workflow must be re-executed to ensure that the final output data is updated to reflect the changes. Since such re-computation can consume substantial resources, optimizing the system to avoid redundant(More)
Having timely and credible security information is becoming critical to network and security management. Most current sources of threat information and detection techniques suffer from having a limited view of the global threat scenario. In this paper, we present Foresight, an internet scale threat analysis, indication, early warning and response(More)
Delay in the judicial processes and pendency of existing cases is an old problem that has defied easy solutions in Pakistan. Most cases are trapped in the system due to a huge backlog of cases, excessive litigation in urban areas, corruption by the court staff and lack of proper monitoring of the functioning of courts. Efficient supervision and monitoring(More)
Over the past few years, many black-hat marketplaces have emerged that facilitate access to reputation manipulation services such as fake Facebook likes, fraudulent search engine optimization (SEO), or bogus Amazon reviews. In order to deploy effective technical and legal countermeasures, it is important to understand how these black-hat marketplaces(More)