Clock Drift

Clock drift refers to several related phenomena where a clock does not run at the exact right speed compared to another clock. That is, after some time the clock "drifts apart" from the other clock. This phenomenon is also used for instance in computers to build random number generators. On the negative side, clock drift can be exploited by timing attacks.

Read more about Clock DriftClock Drift in Normal Clocks, Atomic Clocks, Relativity, Random Number Generators, Timing Attack

Other articles related to "clock drift, clocks, clock, drift":

Hardware Random Number Generator - Physical Phenomena Without Quantum-random Properties - Clock Drift
... There are several ways to measure and use clock drift as a source of randomness ... The output of two are XORed to control the bias on a third oscillator, whose output clocks the output of the fourth oscillator to produce the raw bit ... Most modern computers have two crystal oscillators, one for the real-time clock and one for the primary CPU clock truerand exploits this fact ...
Clock Drift - Timing Attack
... In 2006, a side channel attack was published that exploited clock skew based on CPU heating ... CPU heating is correlated with clock skew, which can be detected by observing timestamps (under the server's real identity) ...
Flex Ray - Details - Clock Synchronization
... Clocks are resynchronized when the voted signal changes from 1 to 0, if the receiver was in either idle state or expecting BSS1 ... So the clock is synchronized when the transmission starts and between BSS0 and BSS1 ... - 11 bits of 8 cycles each), and the clock drift is no larger than 1 per 300 cycles, the drift may skew the clock no more than 1 cycle ...

Famous quotes containing the words drift and/or clock:

    But now they drift on the still water,
    Mysterious, beautiful;
    William Butler Yeats (1865–1939)

    Whoever considers morality the main objective of human existence, seems to me like a person who defines the purpose of a clock as not going wrong. The first objective for a clock, is, however, that it does run; not going wrong is an additional regulative function. If not a watch’s greatest accomplishment were not going wrong, unwound watches might be the best.
    Franz Grillparzer (1791–1872)