A Format-compliant Selective Secret 3D Object Sharing Scheme Based on Shamir’s Scheme

Sebastien Beugnon (1, 2, 3) , William Puech (2) , Jean-Pierre Pedeboy (3)

1 LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
2 ICAR - Image & Interaction
3 Stratégies S.A. [Rungis]

New issues have arisen in the creation of 3D objects linked to collaboration in 3D workflows. In this kind of usage it may be necessary to allow access and to share a lower quality file of a 3D object for some collaborators. In this paper, we present a Format-Compliant Selective Secret 3D Object Sharing (FCSS3DOS) scheme, which visually protects the content using geometrical distortions by selectively sharing bits of a 3D object's geometry using Shamir's Secret Sharing scheme. The degradation level D is selected before the sharing process and determines how much geometrical distortions are induced into n generated shared 3D objects which are given to n participants. When at least k or more participants agree to combine their own shared 3D objects, then the secret 3D object can be recovered without distortion. The value of k can vary between 2 and n. In experimental results, we analyze the degradation level D that influences the geometrical distortions induced into shared 3D objects.

Mots clés: 3D Object; Selective 3D Encryption; Visual Secret Sharing; Content Protection

Domaines: Informatique [cs]; Cryptographie et sécurité [cs.CR]

Sebastien Beugnon, William Puech, Jean-Pierre Pedeboy. A Format-compliant Selective Secret 3D Object Sharing Scheme Based on Shamir’s Scheme. ICASSP 2019 - 44th IEEE International Conference on Acoustics, Speech and Signal Processing, May 2019, Brighton, United Kingdom. pp.2657-2661, ⟨10.1109/ICASSP.2019.8683822⟩. ⟨hal-02121467⟩