Security of PGP private keys

PGP secret keys are protected by a password. Yet people have said that one should not keep one's secret keyring on an insecure machine. Why? -- ____ Richard Kennaway __\_ / School of Information Systems Internet: jrk@sys.uea.ac.uk \ X/ University of East Anglia uucp: ...mcsun!ukc!uea-sys!jrk \/ Norwich NR4 7TJ, U.K.