security issue with signing files

Kent Tong
Sat Nov 24 16:39:01 2001

Dear all,

Suppose a user is about to sign a file that he has just viewed, but someone
else modifies the files over the network, then he will sign over the
contents written by anyone who has write access? How to solve this
problem? This is a common case when the superior is reviewing and signing
a document (in a shared project folder) created by a subordinate.