US 11,875,589 B2
Article dual material-digital anti-forgery protection
Eric Decoux, Vevey (CH); Philippe Gillet, Pully (CH); Philippe Thevoz, Penthalaz (CH); and Elisabeth Wallace, Pully (CH)
Assigned to SICPA HOLDING SA, Prilly (CH)
Appl. No. 17/254,712
Filed by SICPA HOLDING SA, Prilly (CH)
PCT Filed Jun. 3, 2019, PCT No. PCT/EP2019/064366
§ 371(c)(1), (2) Date Dec. 21, 2020,
PCT Pub. No. WO2019/243033, PCT Pub. Date Dec. 26, 2019.
Claims priority of application No. 18178639 (EP), filed on Jun. 19, 2018.
Prior Publication US 2021/0117671 A1, Apr. 22, 2021
Int. Cl. G06V 30/418 (2022.01); G06F 16/22 (2019.01); G06F 16/2455 (2019.01); H04L 9/32 (2006.01); G06V 20/80 (2022.01); G06V 20/00 (2022.01)
CPC G06V 30/418 (2022.01) [G06F 16/22 (2019.01); G06F 16/24556 (2019.01); G06V 20/80 (2022.01); H04L 9/3247 (2013.01); G06V 20/95 (2022.01)] 20 Claims
OG exemplary drawing
 
1. Method A method of securing a given original article of a batch of a plurality of original articles against forgery or tampering, each original article of the batch having its own associated article data and corresponding article digital data, characterized by comprising the steps of:
for each original article of the batch, calculating by means of a one-way function an associated article digital signature of its corresponding article digital data;
calculating a reference aggregated digital signature corresponding to the batch of original articles from all the article digital signatures of the original articles of the batch by means of a one-way accumulator of said article digital signatures, and making available to a user the reference aggregated digital signature;
determining an article verification key corresponding to the article digital signature of said given original article by means of a partial one-way accumulator of all the other article digital signatures used for calculating the reference aggregated digital signature, whereby a candidate article digital signature corresponds to that of an original article of the batch only if the reference aggregated digital signature is calculated from said candidate article digital signature and corresponding article verification key by means of the one-way function; and
applying on the given original article a corresponding machine readable security marking including a representation of its associated article digital data and its corresponding article verification key,
thereby obtaining a marked original article of which article data is secured against forgery or tampering.