Digital Equipment Corporation

Carter Lyman

Paul Ashley Karger

Bruce Eric Mann

B J Herbison

Arnold Miller

Steve Lipner

Apparatus and methods, readily adapted to interface with a standard data transmission network having an unsecure transmission channel, e.g., 'Ethernet,' for the provision of secure transmission of data over the network channel in a manner which is essentially transparent to the standard network devices and users, thereof, are provided. Various encryption keys are generated and utilized within the system to disguise or encrypt information transferrred between network nodes. The encryption keys are made known only to those network devices which are permitted to handle information encrypted with the encryption keys.

Apparatus and method for secure transmission of data over an unsecure

Apparatus and methods, readily adapted to interface with a standard data transmission network having an unsecure transmission channel, e.g., 'Ethernet,' for the provision of secure transmission of data over the network channel in a manner which is essentially transparent to the standard network devices and users thereof, are provided. Various encryption keys are generated and utilized within the system to disguise or encrypt information transferred between network nodes. The encryption keys are made known only to those network devices which are permitted to handle information encrypted with the encryption keys.

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Merrimack, NH, United States of America

Carter Lyman