Suppose that Alice uses two distinct passwords—one strong password for sites where she believes security is important (e.g., her online bank), and one weak password for sites where she does not care...

Suppose that Alice uses two distinct passwords—one strong password for sites where she believes security is important (e.g., her online bank), and one weak password for sites where she does not care much about security (e.g., social networking sites).

a. Alice believes this is a reasonable compromise between security and convenience. What do you think?

b. What are some practical difficulties that might arise with such an approach?