US 12,395,360 B2
Key holder for an optical key and system comprising the key holder for authenticating an optical key by verifying a match of challenge-response pairs
Pepijn Pinkse, Enschede (NL); and Matthijs Velsink, Amsterdam (NL)
Assigned to UNIVERSITEIT TWENTE, Enschede (NL)
Appl. No. 18/265,681
Filed by UNIVERSITEIT TWENTE, Enschede (NL)
PCT Filed Dec. 10, 2021, PCT No. PCT/EP2021/025488
§ 371(c)(1), (2) Date Jun. 7, 2023,
PCT Pub. No. WO2022/122185, PCT Pub. Date Jun. 16, 2022.
Claims priority of provisional application 63/124,135, filed on Dec. 11, 2020.
Prior Publication US 2024/0039740 A1, Feb. 1, 2024
Int. Cl. H04L 9/32 (2006.01); G02B 6/38 (2006.01)
CPC H04L 9/3278 (2013.01) [G02B 6/3831 (2013.01); G02B 6/3834 (2013.01); G02B 6/3855 (2013.01); H04L 2209/12 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A key holder comprising:
a ferrule;
a multimode light guide at least partly embedded inside the ferrule, the multimode light guide comprising a front facet and a back facet which are arranged at opposite ends of the multimode light guide;
an optical key which comprises a light scattering material; and
a mechanical mount which is configured to mount each of the ferrule, the multimode light guide, and the optical key,
wherein,
the back facet of the multimode light guide contacts the optical key,
the multimode light guide is configured so that light can enter into the multimode light guide via the front facet, propagate through the multimode light guide, be scattered by the optical key, and propagate back through the multimode light guide and exit via the front facet,
the mechanical mount is further configured to be detachably connected to a mechanical mount terminator, and
the front facet of the multimode light guide is oriented in a direction of the mechanical mount terminator.