The purpose of this work is to expose the different kinds of identity validation mechanisms as well as the diverse electronic signatures in Colombia, taking into account the development in the international scenery. Three examples are portrayed, digital signatures, fingerprint biometric signatures and passwords; therefore, a comparison is made between all of these mechanisms in a practica! case of a company that is offering its portfolio of products and services on internet. The objective of this work is to evidence which of those mechanisms are stronger than the others, taking into account a legal and technical view.