Verification utilising a plurality of signatures

摘要

An article verification system comprises a first scanner operable to scan an article to create a signature based upon an intrinsic characteristic of the article and a comparator operable to compare the created signature to a plurality of stored signatures created from previous scans of a plurality of articles. More than one stored signature can be associated with each article, each signature for each article being associated with a respective different portion of each article to the other signatures for that article. Thus the system provides for an article to be checked against multiple records of that article. A single match between the later scan and a stored record can be used to positively verify the article.