Colissimo uses the SHA-1 encryption method, this algorithm is used to convert data into hexadecimal from an encryption key and a given character string: the signature. The encryption key is provided by Colissimo. It is unique and generated by the application. It enables you to calculate your signature.
The purpose of the signature is to guarantee that the data transmitted to the delivery method choice page will not be modified later. In particular, it renders memorising the call URL in a browser unusable.
The calculation and the list of the calling parameters composing the signature are included in the Integration Guide for the Delivery Method Selection Page.
