| 摘要 |
The invention relates to a method and associated devices for setting the security level of cryptographic functions (11, 23) used in communication terminals (2) according to situation. In a telecommunication terminal (2), especially in a mobile telephone (2), situation parameters, such as an identification code of a country where the telecommunication terminal (2) is temporarily present, are received in a secured manner from a secure source (3, 4) via a telecommunication network (3), especially a mobile telephone network (3). In addition, in said telecommunication network (2), security parameters, such as the maximum acceptable length (in bits) of cryptographic keys, are determined on the basis of the received situation parameters, and said security parameters are used by the cryptographic functions (11, 23) and determine the security level. |
