[Curry90] Curry, D. Improving the Security of Your UNIX System, SRI International Report ITSTD-721-FR-90-21, April 1990. [This paper describes measures that you, as a system administrator can take to make your UNIX system(s) more secure. Oriented primarily at SunOS 4.x, most of the information covered applies equally well to any Berkeley UNIX system with or without NFS and/or Yellow Pages (NIS). Some of the information can also be applied to System V, although this is not a primary focus of the paper. A very useful reference, this is also available on the Internet in various locations, including the directory cert.sei.cmu.edu:/pub/info.]