USE OF SNMP FOR MANAGEMENT OF SMALL FOOTPRINT DEVICES.

摘要

Methods, devices, and systems are provided for managing and controlling small footprint devices with a lightweight control protocol, such as SNMP. Relatively small control messages are employed that have a compact command portion included in an object identifier portion, thereby circumventing the need for a separate command portion as well as a data body. Also, methods, devices, and systems for improving the security and privacy of processing SNMP messages on SNMP-managed devices by moving this processing together with the sensitive data that the process employ such a cryptographic keys inside the tamper-resistant and tamper-evident boundary of an integrated circuit card. Methods, devices, and systems are provided for managing and controlling small footprint devices with a lightweight control protocol, such as SNMP. Relatively small control messages are employed that have a compact command portion included in an object identifier portion, thereby circumventing the need for a separate command portion as well as a data body. Also, methods, devices, and systems for improving the security and privacy of processing SNMP messages on SNMP-managed devices by moving this processing together with the sensitive data that the process employ such a cryptographic keys inside the tamper-resistant and tamper-evident boundary of an integrated circuit card. A data logging system includes a sensor for monitoring a parameter and a data logger. The data logger includes a first logging mode and a second logging mode. The first logging mode has a low-capacity logging mode adapted to collect data from the sensor at time intervals, identify a start of a data cycle when the parameter reaches a first limit, identify a stop of the data cycle when the parameter reaches a second limit, process the data collected between the start and stop of the data cycle, log the data processed, the data processed having less bytes than the data collected between the start and stop of the data cycle. The second logging mode is adapted to collect data from the sensor at time intervals and to log a portion of the data collected after receiving an event code.