Abstract: A method of securing an industrial control system includes operating the industrial control system in an open mode, wherein communications between a plurality of devices of the industrial control system are unencrypted when the industrial control system is in the open mode. The method includes exchanging security tokens between the plurality of devices of the industrial control system. The method further includes ceasing operating the industrial control system in the open mode and instead operating the industrial control system in a secure mode, wherein the communications between the plurality of devices of the industrial control system are encrypted using the security tokens when the industrial control system is operating in the secure mode.

Abstract: A method of securing an industrial control system includes operating the industrial control system in an open mode, wherein communications between a plurality of devices of the industrial control system are unencrypted when the industrial control system is in the open mode. The method includes exchanging security tokens between the plurality of devices of the industrial control system. The method further includes ceasing operating the industrial control system in the open mode and instead operating the industrial control system in a secure mode, wherein the communications between the plurality of devices of the industrial control system are encrypted using the security tokens when the industrial control system is operating in the secure mode.

Abstract: A method of securing an industrial control system includes operating the industrial control system in an open mode, wherein communications between a plurality of devices of the industrial control system are unencrypted when the industrial control system is in the open mode. The method includes exchanging security tokens between the plurality of devices of the industrial control system. The method further includes ceasing operating the industrial control system in the open mode and instead operating the industrial control system in a secure mode, wherein the communications between the plurality of devices of the industrial control system are encrypted using the security tokens when the industrial control system is operating in the secure mode.

Abstract: A method of securing an industrial control system includes operating the industrial control system in an open mode, wherein communications between a plurality of devices of the industrial control system are unencrypted when the industrial control system is in the open mode. The method includes exchanging security tokens between the plurality of devices of the industrial control system. The method further includes ceasing operating the industrial control system in the open mode and instead operating the industrial control system in a secure mode, wherein the communications between the plurality of devices of the industrial control system are encrypted using the security tokens when the industrial control system is operating in the secure mode.

Abstract: A method of securing an industrial control system includes operating the industrial control system in an open mode, wherein communications between a plurality of devices of the industrial control system are unencrypted when the industrial control system is in the open mode. The method includes exchanging security tokens between the plurality of devices of the industrial control system. The method further includes ceasing operating the industrial control system in the open mode and instead operating the industrial control system in a secure mode, wherein the communications between the plurality of devices of the industrial control system are encrypted using the security tokens when the industrial control system is operating in the secure mode.

Abstract: A method of securing an industrial control system includes operating the industrial control system in an open mode, wherein communications between a plurality of devices of the industrial control system are unencrypted when the industrial control system is in the open mode. The method includes exchanging security tokens between the plurality of devices of the industrial control system. The method further includes ceasing operating the industrial control system in the open mode and instead operating the industrial control system in a secure mode, wherein the communications between the plurality of devices of the industrial control system are encrypted using the security tokens when the industrial control system is operating in the secure mode.

Abstract: A system includes an industrial controller having a memory and a processor configured to operate the industrial controller in an open mode, wherein the open mode is configured to enable the industrial controller to receive instructions via unauthenticated network connection or a local connection. The processor of the industrial controller is further configured to operate the industrial controller in a secure mode, wherein the secure mode is configured to enable the industrial controller to receive instructions only via an authenticated network connection.

Abstract: A system includes a controller and a certificate authority. The controller is configured to control a process. The certificate authority (CA) is configured to issue and to revoke certificates, wherein the controller is configured to use the CA to mutually authenticate a user to enter into a secure mode of operation.

Abstract: A system includes an industrial controller having a memory and a processor configured to operate the industrial controller in an open mode, wherein the open mode is configured to enable the industrial controller to receive instructions via unauthenticated network connection or a local connection. The processor of the industrial controller is further configured to operate the industrial controller in a secure mode, wherein the secure mode is configured to enable the industrial controller to receive instructions only via an authenticated network connection.

Abstract: A system includes a controller and a certificate authority. The controller is configured to control a process. The certificate authority (CA) is configured to issue and to revoke certificates, wherein the controller is configured to use the CA to mutually authenticate a user to enter into a secure mode of operation.