>>> Christopher Klaus put out the idea about changing the archie daemon >>> to detect tampered files [...] >> The problem is, how would the Archie servers determine the >> checksums? > Easy. modify the 'ls' on each ftp site to automatically do a > checksum. [...] I'd much rather have something like an XCKS command. Proposed syntax: XCKS method pathname where "method" could be something like "CRC16", "MD5", etc, and "pathname" is of course the name of the file whose checksum is desired. I propose that the checksum method name be specced to be case-insensitive. Replies, aside from usual errors like 500 (if XCKS isn't recognized) or 530 (if not logged in): 504 That checksum method not implemented here. 213 xxxx (where xxxx is the appropriate checksum in some typical form, such as hexadecimal - perhaps "method" could say, eg MD5-HEX or MD5-BASE64). Maybe it would be better to use a new code (216, say) rather than overloading 213. der Mouse mouse@collatz.mcrcim.mcgill.edu