The Bush administration is planning to propose requiring Internet service providers to help build a centralized system to enable broad monitoring of the Internet and, potentially, surveillance of its users. The proposal is part of a final version of a report, ``The National Strategy to Secure Cyberspace,'' set for release early next year, according to several people who have been briefed on the report. It is a component of the effort to increase national security after the Sept. 11, 2001, attacks. The president's Critical Infrastructure Protection Board is preparing the report, and it is intended to create public and private...