This share-level option tells Samba to force users to authenticate with passwords each time they connect to a different share on a machine, no matter what level of security is in place on the Samba server. The default value is
no, which allows users to be trusted once they successfully authenticate themselves. You can override it as:
revalidate = yes
You can use this option to increase security on your system. However, you should weigh it against the inconvenience of having users revalidate themselves to every share.
