Landis+gyr Technologies, LLC

Landis+gyr Innovations, Inc.

Landis+gyr Technology, Inc.

Rodney Kohout

Stanley E McHann, Jr

August Schack

Craig Leon Cornwall

Stanley E Mchann

Jr Mchann Stanley E

Certain aspects of the disclosure are directed toward validation and installation of a file system. A method for mitigating security breach for a circuit platform subject to compromise by unauthorized changes to a file system includes abstracting the file system into an encrypted file with cryptographically signed components. The file system may have instruction code or other data for an operating system and may be stored by or on behalf of the circuit platform. During boot time of the operating system, an unencrypted version of the operating system and the encrypted file may be accessed and used by validating a signature associated with the file system. In response to validating the signature, the file system is installed into a transient, non-persistent storage circuit. As such, the operating system executes instruction code via a central processing unit (CPU) circuit under authorization based on the validated signature.

Validation and installation of a file system

Various aspects of the disclosure are directed to methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for identifying network events. In one aspect, a method includes monitoring signal characteristic values for signals transmitted over a communications channel of a power line communications system and determining that a signal level value for the channel is less than a threshold signal level value for the channel. In response to determining that the signal level value for the channel is less than the threshold signal level value for the channel, a signal to noise ratio for the communications channel is computer and it is determined that the signal to noise ratio for the channel exceeds a threshold value. In response to determining that the signal to noise ratio for the communications channel exceeds the threshold value, storing data received over the communications channel is stored as valid data.

Network event detection

Various aspects of the disclosure are directed to methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for identifying network events. In one aspect, a method includes monitoring signal characteristic values for signals transmitted over a communications channel of a power line communications system and determining that a signal level value for the channel is less than a threshold signal level value for the channel. In response to determining that the signal level value for the channel is less than the threshold signal level value for the channel, a signal to noise ratio for the communications channel is computed and it is determined that the signal to noise ratio for the channel exceeds a threshold value. In response to determining that the signal to noise ratio for the communications channel exceeds the threshold value, data received over the communications channel is stored as valid data.

A network status is determined based on channel data specifying at least one channel characteristic of a communications channel. Changes in various channel characteristics are indicative of changes in a status of a distributed network. Therefore, these channel characteristics can be monitored over time to identify changes to the status of the distributed network. Changes to channel characteristics can be identified based on normalized channel data that is normalized relative to reference channel data. Status scores are generated based on the normalized channel data. The status scores are, in turn, normalized for channels that are identified as valid channels. The normalized status scores are adjusted based on variations of the channel data and the network status is identified based on status score variations. Status data identifying the network status is generated based on the status of the network.

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Brainerd, MN, United States of America

Rodney Kohout