Title :
Delay attacks — Implication on NTP and PTP time synchronization
Author :
Ullmann, Markus ; Vögeler, Matthias
Author_Institution :
Fed. Office for Inf. Security, Bonn, Germany
Abstract :
In this paper specific variants of delay attacks are examined. First, the Network Time Protocol is regarded. Second, delay attacks and implications on the time synchronization of the Precise Time Protocol are described. In particular, consequences for the offset calculation Oprox are regarded. At the end of the paper possible countermeasurements are described.
Keywords :
cryptographic protocols; delays; synchronisation; telecommunication security; NTP time synchronization; PTP time synchronization; cryptographic protocols; delay security attacks; network time protocol; precise time protocol; time synchronization; Clocks; Counting circuits; Cryptographic protocols; Delay effects; Delta modulation; Master-slave; Propagation delay; Synchronization; Time measurement; World Wide Web; 2008); IEEE 1588 (v2; Network Time Protocol (NTP); Precise Time Protocol (PTP); countermeasurements; cryptographic protocols; delay attacks; implication on time synchronization;
Conference_Titel :
Precision Clock Synchronization for Measurement, Control and Communication, 2009. ISPCS 2009. International Symposium on
Conference_Location :
Brescia
Print_ISBN :
978-1-4244-4391-8
Electronic_ISBN :
978-1-4244-4392-5
DOI :
10.1109/ISPCS.2009.5340224
