GrIDsure
From Wikipedia, the free encyclopedia
GrIDsure was a personal identification system which extends the standard ‘shared-secret’ authentication model to create a secure methodology whereby a dynamic ‘one-time’ password or PIN can be generated by a user. It was invented by Jonathan Craymer and Stephen Howes in November 2005. It has received positive media reception.[1][2][3]
GrIDsure went into liquidation in October 2011 after investor funding dried up.[4]
On 18 November 2011 Cryptocard announced it had acquired the intellectual property of GrIDsure, which includes eight patents that have been granted and a further 16 pending. Cryptocard was already a GrIDsure OEM partner and uses the product in their portfolio.[citation needed]
In order to authenticate, the user is asked to input a series of numbers based on a preregistered pattern on a grid (that the user knows) and a grid of pseudo-random numbers generated by the authenticator. This results in a different series of numbers each time the user authenticates.[5]