(EN) The invention relates to a method for determining an elliptical curve, suitable for a cryptographic method, comprising the following steps: (a) an elliptical curve to be tested is prepared; (b) the order of a twisted elliptical curve associated with the elliptical curve to be tested is determined; (c) it is automatically checked whether the order of the twisted elliptical curve is a strong prime number; and (d) if the order of the twisted elliptical curve is a strong prime number, the elliptical curve to be tested is selected as an elliptical curve suitable for cryptographical methods. ©KIPO&WIPO 2009