Method for the secure application of a cryptographic algorithm of the rsa type and corresponding component

The invention claims a method for the electronic component in the middle of the rsa type a cryptography algorithm of the security application method of. The method allows operation there is no need to said value prior knowledge of under the condition from possible values of a given group to obtain the public exponent e value of the has been determined public exponent e of the said value after allows using of e value of the policy to prevent false attack or side of signal path attack especially can be used in a cryptography algorithm of the private application operation is performed on the model and dpa spa is used to model the side of the signal path attack.