Method for sharing resources between a trustee tenant (T2) and a trustor tenant (T1) in a cloud network, this method including: - a step (E10) of reception, by a module (TBM) for establishing a trust relationship, of a requirements file (REQ) from the trustee tenant (T2), said file containing at least one permission (p1) desired by said tenant, - a step (E20, E30) of searching, by a module (TBM) for establishing a trust relationship, for at least one opportunities file (OPP) transmitted by a trustor tenant (T1), this file containing at least said permissions (p1); - a step (E50) of recording, by a module (TBM) for establishing a trust relationship, an item of information representative of a trust relationship for the sharing of resources between said tenants (T1, T2), the method furthermore comprising: - a step (F10) of reception, by a reception module (PEP), from the trustee tenant (T2), of a request to benefit from permission (p1) to access said resource; - a step (F30) of identification, by an identification module (PDP, PIP), of a virtual role (vrl) in the namespace of the trustee tenant (T2); - a step (F70) of verification, by a verification module (TVM), during which it is verified that the namespace of the trustor tenant (T1) contains a role (r1) offering said permission (p1) and that a trust relationship for the sharing of resources has been established between the trustor tenant (T1) and the trustee tenant (T2), said verification step (F70) consisting in determining that said virtual role (vrl) in the namespace of the trustee tenant (T2) points to said role (r1) in the namespace of the trustor tenant (T1) ; - a step (F90) of authorization or prevention, by an access control module (PDP), of said access on the basis of the result of said verification step (E70). - a step (E10) of reception, by a module (TBM) for establishing a trust relationship, of a requirements file (REQ) from the trustee tenant (T2), said file containing at least one permission (p1) desired by said tenant, - a step (E20, E30) of searching, by a module (TBM) for establishing a trust relationship, for at least one opportunities file (OPP) transmitted by a trustor tenant (T1), this file containing at least said permissions (p1); - a step (E50) of recording, by a module (TBM) for establishing a trust relationship, an item of information representative of a trust relationship for the sharing of resources between said tenants (T1, T2), the method furthermore comprising: - a step (F10) of reception, by a reception module (PEP), from the trustee tenant (T2), of a request to benefit from permission (p1) to access said resource; - a step (F30) of identification, by an identification module (PDP, PIP), of a virtual role (vrl) in the namespace of the trustee tenant (T2); - a step (F70) of verification, by a verification module (TVM), during which it is verified that the namespace of the trustor tenant (T1) contains a role (r1) offering said permission (p1) and that a trust relationship for the sharing of resources has been established between the trustor tenant (T1) and the trustee tenant (T2), said verification step (F70) consisting in determining that said virtual role (vrl) in the namespace of the trustee tenant (T2) points to said role (r1) in the namespace of the trustor tenant (T1) ; - a step (F90) of authorization or prevention, by an access control module (PDP), of said access on the basis of the result of said verification step (E70). <EOS>