Intrusion detection systems (IDSs) are important components of network security. However, it is well known that current IDSs generate large amount of alerts, including both true and false alerts. Other than proposing new techniques to detect intrusions without such problems, this thesis presents...

Data analysts often prefer access to data in the form of original tuples(i.e., microdata), instead of pre-aggregated statistics, since the former offers advantages in information flexibility and availability. Two problems should be addressed before releasing microdata. First, individual's...