A number of security patterns for Web applications under the DARPA contract have been developed...

The various patterns applicable to aspects of authentication in the Web applications are as follows: Account lockout: It implements a limit on the incorrect password attempts to protect an account from automated password-guessing attacks. Authenticated session: It allows a user to access more than one access-restricted Web page without re-authenticating every page. It also integrates user authentication into the basic session model. Password authentication: It provides protection against weak passwords, automated password-guessing attacks, and mishandling of passwords. Password propagation: It offers a choice by requiring that a user's authentication credentials be verified by the database before providing access to that user's data. Answer: B and C are incorrect. Secure assertion and partitioned application patterns are applicable to software assurance in general.