All Articles for

Blacklist (Computing)

In computing, a blacklist or block list is a basic access control mechanism that allows through all elements (email addresses, users, urls, etc. ), except those explicitly mentioned. those items on the list are denied access. the opposite is a whitelist, which means only items on the list are let through whatever gate is being used. a greylist contains items that are temporarily blocked (or temporarily allowed) until an additional step is performed.