References
SUN public key infrastructure overview: http://www.sun.com/blueprints/0801/publickey.pdf
OpenSSL documentation: http://www.openssl.org/docs/apps/openssl.html
Cygwin home page: http://www.cygwin.com/
Signed Tcl scripts: http://www.cisco.com/en/US/docs/ios/12_4t/netmgmt/configuration/guide/sign_tcl.html