Method and apparatus for time synchronization in a network data processing system
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Abstract
A method, apparatus, and computer implemented instructions for synchronizing time in a network data processing system. A request for time synchronization is received at a target data processing system. A current target time at the target data processing system is placed in a reply. The reply is sent to the source data processing system. A current source time from when the reply is received at the source data processing system is compared to the current target time to generate a comparison. A synchronization factor is generated using the comparison.
31 Citations
42 Claims
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1-5. -5. (canceled)
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6. A method in a data processing system for synchronizing time, the method comprising:
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sending a synchronization request to a target system;
receiving a reply, wherein the reply includes a current time from the target system;
identifying a clock skew using the current time from the target system; and
generating a time stamp for an authentication request including a set of user credentials using the clock skew for an authentication process which validates the authentication request wherein the set of user credentials is valid for a predetermined period of time. - View Dependent Claims (7, 8, 9, 12, 13)
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10-11. -11. (canceled)
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14. A data processing system comprising:
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a bus system;
a communications unit connected to the bus, wherein data is sent and received using the communications unit;
a memory connected to the bus system, wherein a set of instructions are located in the memory; and
a processor unit connected to the bus system, wherein the processor unit executes the set of instructions to send a synchronization request to a target system;
receive a reply, wherein the reply includes a current time from the target system;
identify a clock skew using the current time from the target system; and
generate a time stamp for an authentication message including a set of user credentials using the clock skew, wherein the user credentials are valid for a predetermined period of time. - View Dependent Claims (15, 16, 17, 18, 38, 39, 40, 41, 42)
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19-33. -33. (canceled)
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34. A computer program product in a computer readable medium for synchronizing time, the computer program product comprising:
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first instructions for sending a synchronization request to a target system;
second instructions for receiving a reply, wherein the reply includes a current time from the target system;
third instructions for identifying a clock skew using the current time from the target system; and
fourth instructions for generating a time stamp for an authentication request including a set of user credentials using the clock skew for an authentication process which validates the authentication request wherein the set of user credentials is valid for a predetermined period of time. - View Dependent Claims (35, 36, 37)
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Specification