Randomness extraction is of fundamental importance for information-theoretic cryptography. It allows to transform a raw key about which an attacker has some limited knowledge into a fully secure random key, on which the attacker has essentially no information. Up to date, only very few randomness-extraction techniques are known to work against an attacker holding quantum information on the raw ...

Sybil attacks pose a serious threat for Wireless Sensor Networks (WSN) security. They can create problems in routing, voting schemes, decision making, distributed storage and sensor re-programming. In a Sybil attack, the attacker masquerades as multiple sensor identities that are actually controlled by one or a few existing attacker nodes. Sybil identities are fabricated out of stolen keys, obt...

This paper examines the denial of service attacks that an 802.16 Broadband Wireless Access network is susceptible to at the physical and medium access control layers. In our threat model, we assume that the attacker is external to the network i.e. the attacker cannot associate with the network and send packets as a participant; nor can the attacker decrypt encrypted data. However , the attacker...

In cybersecurity, attackers range from brash, unsophisticated script kiddies and cybercriminals to stealthy, patient advanced persistent threats. When modeling these attackers, we can observe that they demonstrate different risk-seeking risk-averse behaviors. This work explores how an attacker’s risk seeking or averse behavior affects their operations against detection-optimizing defenders in I...

Sybil attacker is the routing layer active attacker that replies with multiple identification number (ID's) to nodes that forward request to attacker in a different time instant and drop the data forwarded to attacker after link establishment. The proposed research work is provides the novel secure Intrusion Detection System (IDS) against routing misbehavior of Sybil attack in MANET. The IDS ar...

Open Shortest Path First (OSPF) is the most popular interior gateway routing protocol on the Internet. Most of the known OSPF attacks are based on falsifying the link state advertisement (LSA) of an attacker-controlled router. These attacks may create serious damage if the attacker-controlled router is strategically located. However, these attacks can only falsify a small portion of the routing...