1. one argument in the security communit is that lack of diversity is itself a vulnerability. for example, the two dominant browsers, mozilla firefox and microsoft internet explorer, are use by approximately 95 percent of internet users. what security risk does this control of the market introduce? suppose there three (each with a significant share of the market). would three negate that security risk?

2. the workstation is a weak link in systems like pki and kerberos: a compromised
workstation can collect and transmit cleartext passwords and encryption keys.
suggest a means to prevent compromise of a workstation from, for example, a
trojan horse.