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Patent US10305887
Issued 2019-05-28
Method And System For Hand Held Terminal Security
A computer implemented method and apparatus for authenticating a field tool by a field device comprising: receiving, on a field device, an authentication certificate; verifying the authentication certificate using a trust anchor certificate on the field device; securing communication between the field tool and the field device with a key generated by a key derivation method using exchanged certificates; receiving a field tool task authorization certificate; verifying the authorization certificate using a trust anchor certificate on the field device; receiving a task request to perform a task by the field tool; and determining whether the task is authorized based on the task authorization certificate; and performing the task on the field device when it is determined the task is authorized.
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- 1. A computer implemented method for authenticating a field tool by a field device comprising:
receiving, on the field device, an authentication certificate; verifying the authentication certificate using a trust anchor certificate on the field device; securing communication between the field tool and the field device; receiving a field tool task authorization certificate; verifying the task authorization certificate using the trust anchor certificate on the field device; receiving, from the field tool, a request to perform a task; and determining whether the task is authorized based on the task authorization certificate; and performing the task on the field device when it is determined the task is authorized.
- 7. A system for authenticating a field tool by a field device comprising:
a field tool for performing tasks on one or more field devices of a plurality of field devices, wherein each field device of the plurality of field devices is configured to:
receive, on the field device, an authentication certificate;
verify the authentication certificate using a trust anchor certificate on the field device;
secure communication between the field tool and the field device;
receive a field tool task authorization certificate;
verify the task authorization certificate using the trust anchor certificate on the field device;
receive, from the field tool, a request to perform a task; and
determine whether the task is authorized based on the task authorization certificate; and
perform the task on the field device when it is determined the task is authorized.
- 15. A field device for authenticating a field tool, comprising:
a) at least one processor; b) at least one input device; c) at least one output device; and d) at least one storage device storing processor executable instructions which, when executed by the at least one processor, perform a method including:
receiving, on the field device, an authentication certificate;
verifying the authentication certificate using a trust anchor certificate on the field device;
securing communication between the field tool and the field device;
receiving a field tool task authorization certificate;
verifying the task authorization certificate using the trust anchor certificate on the field device;
receiving, from the field tool, a request to perform a task; and
determining whether the task is authorized based on the task authorization certificate; and
performing the task on the field device when it is determined the task is authorized.
