Compromised machines are one of the key security threats on the Internet; they are often used to launch various security attacks such as DDoS, spamming, and identity theft. In this paper we address this issue by investigating effective solutions to automatically identify compromised machines in a network. Given that spamming provides a key economic incentive […]
Extending Attack Graph-Based Security Metrics and Aggregating Their Application
The attack graph is an abstraction that reveals the ways an attacker can leverage vulnerabilities in a network to violate a security policy. When used with attack graph-based security metrics, the attack graph may be used to quantitatively assess security-relevant aspects of a network. The Shortest Path metric, the Number of Paths metric, and the […]
Extending Attack Graph-Based Security Metrics and Aggregating Their Application
The attack graph is an abstraction that reveals the ways an attacker can leverage vulnerabilities in a network to violate a security policy. When used with attack graph-based security metrics, the attack graph may be used to quantitatively assess security-relevant aspects of a network. The Shortest Path metric, the Number of Paths metric, and the […]
Dynamic Security Risk Management Using Bayesian Attack Graphs
Security risk assessment and mitigation are two vital processes that need to be executed to maintain a productive IT infrastructure. On one hand, models such as attack graphs and attack trees have been proposed to assess the cause-consequence relationships between various network states, while on the other hand, different decision problems have been explored to […]
Improving Energy Saving and Reliability in Wireless Sensor Networks Using a Simple CRT-Based Packet-Forwarding Solution
This paper deals with a novel forwarding scheme for wireless sensor networks aimed at combining low computational complexity and high performance in terms of energy efficiency and reliability. The proposed approach relies on a packet-splitting algorithm based on the Chinese Remainder Theorem (CRT) and is characterized by a simple modular division between integers. An analytical […]
Optimization of Resource Provisioning Cost in Cloud Computing
In cloud computing, cloud providers can offer cloud consumers two provisioning plans for computing resources, namely reservation and on-demand plans. In general, cost of utilizing computing resources provisioned by reservation plan is cheaper than that provisioned by on-demand plan, since cloud consumer has to pay to provider in advance. With the reservation plan, the consumer […]
A Secure Erasure Code-Based Cloud Storage System with Secure Data Forwarding
A cloud storage system, consisting of a collection of storage servers, provides long-term storage services over the Internet. Storing data in a third party’s cloud system causes serious concern over data confidentiality. General encryption schemes protect data confidentiality, but also limit the functionality of the storage system because a few operations are supported over encrypted […]
A Gossip Protocol for Dynamic Resource Management in Large Cloud Environments
We address the problem of dynamic resource management for a large-scale cloud environment. Our contribution includes outlining a distributed middleware architecture and presenting one of its key elements: a gossip protocol that (1) ensures fair resource allocation among sites/applications, (2) dynamically adapts the allocation to load changes and (3) scales both in the number of […]
Ensuring Distributed Accountability for Data Sharing in the Cloud
Cloud computing enables highly scalable services to be easily consumed over the Internet on an as-needed basis. A major feature of the cloud services is that users’ data are usually processed remotely in unknown machines that users do not own or operate. While enjoying the convenience brought by this new emerging technology, users’ fears of […]
Design and Implementation of TARF: A Trust-Aware Routing Framework for WSNs
The multihop routing in wireless sensor networks (WSNs) offers little protection against identity deception through replayingrouting information. An adversary can exploit this defect to launch various harmful or even devastating attacks against the routingprotocols, including sinkhole attacks, wormhole attacks, and Sybil attacks. The situation is further aggravated by mobile and harshnetwork conditions. Traditional cryptographic techniques […]
- « Previous Page
- 1
- …
- 76
- 77
- 78
- 79
- 80
- …
- 108
- Next Page »