1
Ross W Callon, Radia J Perlman, Eric C Rosen, John Harper: Multiple protocol routing. Digital Equipment Corporation, Fish & Richardson, October 5, 1993: US05251205 (336 worldwide citation)

A method for connecting a network so that TCP/IP and OSI 8473 packets may be routed in the same domain. The independence of the addresses is maintained: one device in the network may be assigned only a TCP/IP address, and another device may be assigned only a ISO 8473 address. Furthermore, all of th ...


2
Radia J Perlman, G Paul Koning: Bridge-like internet protocol router. Digital Equipment Corporation, A Sidney Johnston, Albert P Cefalo, Noel F Heal, May 3, 1994: US05309437 (276 worldwide citation)

A device and related method for coupling segments of an extended local area network (LAN) in such a way that message traffic employing inter-network protocols such as TCP/IP will be handled without the difficulties usually associated with bridges, and without the complexity and expense of full IP ro ...


3
Joseph L Gervais, Alampoondi E Natarajan, Michael D Allen, Radia J Perlman: Internetwork address mapping gateway. Novell, Cesari and McKenna, January 5, 1999: US05856974 (231 worldwide citation)

The present invention is an address mapping gateway, used in an internetwork link, that associates all nodes in a domain with a single network number (referred to as a domain network address), and provides gateway-mapped node addresses that are unique within the domain. The address mapping gateway d ...


4
Radia J Perlman, Charles W Kaufman: Method of issuance and revocation of certificates of authenticity used in public key networks and other systems. Digital Equipment Corporation, A Sidney Johnston, Albert P Cefalo, Barry N Young, November 9, 1993: US05261002 (146 worldwide citation)

A technique for issuing and revoking user certificates of authenticity in a public key cryptography system, wherein certificates do not need expiration dates, and the inconvenience and overhead associated with routine certificate renewals are minimized or avoided entirely. A Certification Authority ...


5
Radia J Perlman, Neal D Castagnoli: Method and apparatus for determining characteristics of a path. Novell, Cesari and McKenna, July 14, 1998: US05781534 (140 worldwide citation)

An information gathering mechanism efficiently acquires information about a path interconnecting a source node and a destination node in a computer network. The mechanism comprises a novel packet configuration for soliciting parameters pertaining to network characteristics from routers coupled to th ...


6
Radia J Perlman, Stephen R Hanna: Methods and systems for establishing a shared secret using an authentication token. Sun Microsystems, Finnegan Henderson Farabow Garrett & Dunner L, January 9, 2001: US06173400 (124 worldwide citation)

A method and system for establishing a shared secret between a plurality of devices using an authentication token. An authentication token is used to establish a shared secret between a local device and a remote device to provide user authentication, data encryption, and integrity protection. The au ...


7
Radia J Perlman: Robust packet routing over a distributed network containing malicious failures. Digital Equipment Corporation, Fish & Richardson, October 3, 1995: US05455865 (118 worldwide citation)

A method and system for routing information packets among nodes interconnected by links to form a network, each information packet traversing a path of links and nodes from a source node to a destination node. Information indicating the relationships of nodes and links in the network is assembled in ...


8
Dah Ming Chiu, Miriam C Kadansky, Stephen R Hanna, Stephen A Hurst, Joseph S Wesley, Philip M Rosenzweig, Radia J Perlman: Multiple ACK windows providing congestion control in reliable multicast protocol. Sun Microsystems, Cesari and McKenna, January 7, 2003: US06505253 (114 worldwide citation)

A multicast repair tree is established, the repair tree having one sender station and a plurality of repair head stations. A repair head station has an affiliated group of member stations. A repair head station retransmits a lost message to its affiliated group of member stations upon receipt from a ...


9
Radia J Perlman, Stephen R Hanna: Method and system for providing limited access privileges with an untrusted terminal. Sun Microsystems, Finnegan Henderson Farabow Garrett & Dunner L, January 21, 2003: US06510523 (112 worldwide citation)

A method and system for providing limited access privileges with an untrusted terminal allows a user to perform privileged operations between the untrusted terminal and a remote terminal in a controlled manner. The user can establish a secure communications channel between the untrusted terminal and ...


10
Radia J Perlman, Alan J Kirby, Floyd J Backes, Charles W Kaufman: Router using multiple hop redirect messages to enable bridge like data forwarding. Digital Equipment Corporation, A Sidney Johnston, David A Dagg, March 19, 1996: US05500860 (107 worldwide citation)

An apparatus for forwarding a data packet from a first link to a second link is disclosed. The apparatus is coupled with a plurality of computer networks through ports on the apparatus. The apparatus maintains a spanning tree list indicating which of the apparatus ports are active. The apparatus rec ...