Method for determining a security assurance level of a mobile communication, with the following steps: a) a mobile communication terminal sends a service request to an infrastructure device of a mobile communication network, b) the infrastructure device determines a scheduled security standard for the requested service, wherein the security standard defines minimum security measures within the mobile communication network; b') the infrastructure device verifies whether the minimum security measures are active within the mobile communication network or not, wherein the operator of the infrastructure device actively checks relevant security information (α, β, δ) including that the infrastructure device requests and receives assurance information about telecom infrastructure of the mobile communication network required for the requested service, and the infrastructure device determines a security assurance level (rd, ye, gr) that can be achieved for the mobile communication required for said service, wherein the security assurance level (rd, ye, gr) is a function of the ratio of the verified active security measures and the respective minimum security measures as defined by the security standard, and wherein said mobile communication involves the mobile communication terminal and said mobile communication network, c) the infrastructure device sends information about the determined security assurance level (rd, ye, gr) to the mobile communication terminal, wherein the determined security assurance level (rd, ye, gr) is an indication for a user of the mobile communication terminal to decide whether to establish the requested service or not, d) the mobile communication terminal indicates said security assurance level (rd, ye, gr) to a user, and e) the user decides whether to establish the mobile communication required for the service or not. a) a mobile communication terminal sends a service request to an infrastructure device of a mobile communication network, b) the infrastructure device determines a scheduled security standard for the requested service, wherein the security standard defines minimum security measures within the mobile communication network; b') the infrastructure device verifies whether the minimum security measures are active within the mobile communication network or not, wherein the operator of the infrastructure device actively checks relevant security information (α, β, δ) including that the infrastructure device requests and receives assurance information about telecom infrastructure of the mobile communication network required for the requested service, and the infrastructure device determines a security assurance level (rd, ye, gr) that can be achieved for the mobile communication required for said service, wherein the security assurance level (rd, ye, gr) is a function of the ratio of the verified active security measures and the respective minimum security measures as defined by the security standard, and wherein said mobile communication involves the mobile communication terminal and said mobile communication network, c) the infrastructure device sends information about the determined security assurance level (rd, ye, gr) to the mobile communication terminal, wherein the determined security assurance level (rd, ye, gr) is an indication for a user of the mobile communication terminal to decide whether to establish the requested service or not, d) the mobile communication terminal indicates said security assurance level (rd, ye, gr) to a user, and e) the user decides whether to establish the mobile communication required for the service or not.