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4 result(s) for Timestamps

• OPC-10000-2 – OPC Unified Architecture - Part 2: Security Model
  5.1.6 Message replay
  replay See 4.3.6 for a description of this threat. OPC UA uses SessionIds , SecureChannelIds , Timestamps , sequence numbers and RequestIds for every request and response Message . Message s are signed ... detected and rejected. The establishment of a SecureChannel or Session includes the same signature, timestamps and sequence number that are part of all messages and thus cannot be replayed
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.2.2 Parameters
  invalid for maxAge . timestampsTo Return Enum TimestampsTo Return An enumeration that specifies the Timestamps to be returned for each requested Variable Value Attribute . The TimestampsToReturn enumeration is defined
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  6.3 Time synchronization
  order to check the expiry times for Certificates or CRLs . In addition, incorrect Timestamps on Data and Events could create interoperability issues. The Network Time Protocol ( NTP ) provides a standard ... operating system cannot practically support NTP then an OPC UA application can use the Timestamps in the ResponseHeader (see OPC 10000-4 ) to synchronize its clock. In this scenario
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.1.2 Annotations Property
  described in 6.5.6 . The ReadAnnotationDataDetails contains an element reqTimes that is a list of Timestamps . These Timestamps can be obtained from an invocation of the HistoryRead service call with