Denial of service attack. Denial of service attack means any actions or instructions constructed or generated with the ability to damage, interfere with or otherwise affect the availability or performance of networks, network services, network connectivity or computer systems. Denial of service attacks include, but are not limited to, the generation of excess traffic into network addresses, the exploitation of system or network weaknesses, the generation of excess or non-genuine traffic between and amongst networks and the procurement of such actions or instructions by other computer systems.
Denial of service attack. The term "
Denial of service attack. Assume that an attacker has got a legitimate Ui’s smart card. However, in the proposed scheme, the smart card computes C3*=h(C2⊕h(b* PWi*)⊕h(IDi*)) and compares it with the stored C3 in its memory to checks the validity of Ui’s identity IDi and password PWi before the password update procedure. It is not possible for the attacker to guess out Xx’s s identity IDi and password PWi correctly at the same time in polynomial time. Moreover, once the number of login failure exceeds a predefined system value, the smart card will be locked immediately. Therefore, the proposed scheme is secure against denial of service attack.
Denial of service attack. S. alleging, based upon, arising out of or attributable to any failure, interruption, or outage to Internet access service provided by the Internet service provider that hosts the Insured’s Website, unless such infrastructure is under the Insured’s operational control. However, this Exclusion shall not apply to Insuring Agreement I.C (Cyber Extortion Incident Coverage); T. alleging, based upon, arising out of or attributable to the inability to use, or lack of performance of, software programs:
Denial of service attack. Denial of service attack means any actions or instructions constructed or generated with the ability to damage, interfere with or otherwise affect the availability of networks, network services, network connectivity or information systems. Denial of service attacks include, but are not limited to the generation of excess traffic into network addresses, the exploitation of system or network weaknesses and the generation of excess or non-genuine traffic between and amongst networks. For section – Terrorism Denial of service attack means any actions or instructions constructed or generated with the ability to damage, interfere with or otherwise affect the availability or performance of networks, network services, network connectivity or computer systems. Denial of service attacks include, but are not limited to, the generation of excess traffic into network addresses, the exploitation of system or network weaknesses, the generation of excess or non-genuine traffic between and amongst networks and the procurement of such actions or instructions by other computer systems.
Denial of service attack. When the attacker steals the user’s smart card, the attacker can obtain the user’s identity IDi through physically monitoring the power consumption [38]. Through using this, in the password change phase, the attacker can easily set a new password, since it is invalid for verification to simply compare an entered IDi and a stored IDi in smart card. The following is a detailed description:
Denial of service attack. A Denial-of-Service Attack (DoS Attack) in computing is a cyber-attack in which the attacker seeks to make a computer or network resource inaccessible to its intended users by temporarily or permanently disabling a host's Internet connected services. This attack is overcome by restricting the size, i.e. not allowing more than a set number of requests from the same identifier. If it reaches the request cap the node is blocked and is unable to connect with the other nodes in the network any further. The table shows the comparative analysis of the proposed protocol with the existing protocols. Table- I: Comparative Analysis Factor s for Compa rison Protocols Our Protocol Saveless key Based Drone Authentication Remote User Authentication & Key Agreement Scheme Compu tation 2(3.8*10-8), 1 enc, 1dec 2logN(3.8*10-8), 1 enc, 1dec 32(3.8*10-8), 15 XOR operations Storage 512 bits 128 bits 2410 bits Comm unicati on 1024 bits 132608 bits 1696 bits
Denial of service attack. Xxxxxxx et al.’s protocol uses a temporary ID for the patient, which provides message freshness based on session different timestamp T1. The usage of the temporary ID is for person anonymity of the patient, which claimed to be one of important factor of Xxxxxxx et al.’s protocol. TS should always reject any legal patient A’s request in Xxxxxxx et al.’s protocol. The reason is that TS requires to decipher CA to get (XA||PA||T1) at verification phase. However, to decipher the cipher text, TS should choose any pre-share key with the targeting patient after identifying the patient based on XXX∼X. However, TS could not know the real patient with XXX∼T, which is obtained by taking the hash operation of XA, PAand N1. Xxxxxxx, there is only possibility that TS rejects the legal patient’s authentication requests, which results in denial of service. The reason for the possibility of denial of service attack against Xxxxxxx et al.’s protocol is that the protocol provides no method that TS could distinguish the message owner.
