The PolicyKey [1] only checks whether your computer is configured in compliance with HSU security requirements; none of your personal data is checked, collected, or stored (see What information do you collect? [2]). In fact, a big reason for implementing the PolicyKey is to protect the information about you that's stored on the HSU network from a breach caused by malware [3] infecting and compromising the security of our network.
Links:
[1] http://www.humboldt.edu/its/glossary/5#term136
[2] http://www.humboldt.edu/its/node/965
[3] http://www.humboldt.edu/its/glossary/5#term200