... from a statistical data bank. Datamation’16, 5 (May 1970), 74-75. 11. KAM, J.B., AND ULLMAN, J.D. A model of statistical databases and their security. ACM Trans. Database Syst. 2, 1 (March ... database security, data security, secure query functions, statistical database, tracker CR Categories: 3.7 1. INTRODUCTION Statistical databases must supply statistical summaries about a ... databases have a general tracker, and general trackers are almost always easy to find. Security is not guaranteed by the lack of a general tracker. Key Words and Phrases: confidentiality, database...