Secure multiprotocol interface
US6976174B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2001 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Dec 3, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/03
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A network interface for secure multiprotocol data communication includes a doorbell circuit, a processor, memory, and a bridge circuit. The doorbell circuit responds to physical I/O addresses of the host that are mapped by a memory management unit by a registration process. An application program seeking to use a multiprotocol channel must register the virtual address of host memory where data for communication is or will be stored and register the virtual address of a page of I/O addresses. Access to the doorbell functions and to the host memory via the memory management unit are therefore denied when the requesting process identifier does not successfully compare with the process identifier for the process that performed the registrations. A password may be stored in the network interface in association with a multiprotocol channel identifier and stored in association with the virtual to physical map used for communication. The network interface may abandon a requested or implied data communication function when passwords do not successfully compare. Methods for multiprotocol communication performed by an application program may include one or more of the steps of (a) establishin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.