In the discussion of making applications more secure, an approach that was proposed was to design applications so that they restrict the use of risky...

In the discussion of making applications more secure, an approach that was proposed was to design applications so that they restrict the use of risky features to the circumstance that the users of the application are prepared to trust each other. However, without some means for tracking identity, there is no basis to establish trust. Which of the following would be the best answer?

1. The lack of a mechanism in the architecture of the Internet to identify users to each other is a fundamental barrier to building trust among users
2. The current system of Certificate Authorities could be extended to provide robust identity credentials for users
3. Some applications today benefit from lack of any identity mechanisms