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    PROCEDE ET SYSTEME DE DELEGATION D'UN CALCUL D'UNE VALEUR DE COUPLAGE BILINEAIRE A UN SERVEUR DE CALCUL
    1.
    发明公开
    PROCEDE ET SYSTEME DE DELEGATION D'UN CALCUL D'UNE VALEUR DE COUPLAGE BILINEAIRE A UN SERVEUR DE CALCUL 有权
    方法和系统为方便计算对于服务器转移双线性CLUTCH价值的计算

    公开(公告)号：EP3008851A1

    公开(公告)日：2016-04-20

    申请号：EP14738552.0

    申请日：2014-06-10

    申请人： Orange

    发明人： CANARD, Sébastien ,  DEVIGNE, Julien ,  SANDERS, Olivier

    IPC分类号： H04L9/30

    CPC分类号： H04L9/0869 ,  G06F7/588 ,  H04L9/3073 ,  H04L2209/24 ,  H04L2209/76

    摘要： The method of delegating according to the invention a calculation of a value e(A,B) of bilinear coupling between two values A and B by an entity to a calculation server comprises: - the selection (E10) by the entity of public elements P1 and P2 and of secret elements S1 and S2, two elements out of P1, P2, S1 and S2 being taken equal to A and B; — the generation (E20) by the entity of elements R1 =vS1, R2=uS2, T1 =uP1+S1, T2=vP2+S2, where u and v are random; - the transmission (E30) by the entity of R1, R2, T1 and T2 to the calculation server; - the calculation (E40) by the server of: (a1)
    y = e(T1, T2)[e(R1, P2)e(P1, R2)]-1 (a2)
    z = e(D1, D2), y and z designating two integers equal to 1 or to an integer c, D1 and D2 designating two public elements out of A and B or R1 and R2; - the transmission (E50) by the server of a1 and a2 to the entity; - the obtaining (E60) of the value e(A,B) by the entity on the basis of a1 or a2.

    PROCÉDÉ DE MISE A JOUR D'UNE ARBORESCENCE DE FICHIERS MÉMORISÉE SUR UN SERVEUR DE STOCKAGE
    4.
    发明公开
    PROCÉDÉ DE MISE A JOUR D'UNE ARBORESCENCE DE FICHIERS MÉMORISÉE SUR UN SERVEUR DE STOCKAGE 有权
    方法来更新存储服务器上存储的文件树

    公开(公告)号：EP3078155A1

    公开(公告)日：2016-10-12

    申请号：EP14814923.0

    申请日：2014-11-12

    申请人： Orange

    发明人： CANARD, Sébastien ,  DEVIGNE, Julien

    IPC分类号： H04L9/08 ,  H04L9/30

    CPC分类号： H04L9/0618 ,  H04L9/0643 ,  H04L9/0825 ,  H04L9/0866 ,  H04L9/0894 ,  H04L9/3013 ,  H04L2209/60 ,  H04L2209/76

    摘要： The method comprises, for each inclusion of an element in a target folder of a file tree of a first user, stored on a storage server, which the first user has authorized a second user to access by providing a re-enciphering key for the target folder of the first to the second user: — the generation of a re-enciphering key for the first user of the element to a folder of a hierarchical level directly above in the tree containing element, by using a secret identifier of the element, a secret identifier of the folder of the level directly above, and private and public keys of the first user; — if the element is a file, the enciphering of the element with a public key of the first user and the secret identifier of the element; and — the updating of the tree comprising the provision to the server of the re-enciphering key generated for the first user, and as appropriate of the cipher of the element.