Patent ID: 9281945
Filing Date: 2016-03-08
CPC Classification: G06F,H04L

Claim Text:
1. A method for providing authentication of a user of a recipient unit, comprising: during on an online communication between a sender unit and the recipient unit, storing, by the recipient unit, at least one challenge-reply set associated with an article, the at least one challenge-reply set including at least a challenge-reply pair for use in off-line authentication of the user for a particular resource available through the recipient unit; during an off-line condition of the recipient unit, selecting, by the recipient unit, for off-line authentication of the user for the particular resource available through the recipient unit, the at least one stored challenge-reply set; and authenticating the user, by the recipient unit, during the off-line condition using the selected stored challenge and corresponding stored reply from the stored challenge-reply set.