| Publisher | North Carolina State University | ||
|---|---|---|---|
| Format | 216.1KB PDF | Date added | 28 Jun 2006 |
| Topics | Network Security, Security Management, Denial of Service | ||
| Downloads | 10 | ||
Trust management is an approach to scalable and flexible access control in decentralized systems. In trust management, a server often needs to evaluate a chain of credentials submitted by a client; this requires the server to perform multiple expensive digital signature verifications. This paper studies low-bandwidth Denial-of-Service (DoS) attacks that exploit the existence of trust management systems to deplete server resources. Although the threat of DoS attacks has been studied for some application-level protocols such as authentication protocols, the paper shows that it is especially destructive for trust management systems. Exploiting the delegation feature in trust management languages, an attacker can forge a long credential chain to force a server to consume a large amount of computing resource.
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