DiFi, Altinn and Lånekassen will implement a national digital signature to sign document submissions and mutual agreements. It is anticipated that a pilot will be launched in 2012.A digital signature is very different to a hand signature, for instance how to establish what you actually sign. Moreover, the verification of a digital signature requires a correct and valid public key, whereas a handwritten signature is physically produced by a person.The candidate of this project will try to understand the signature applications of Altinn and Lånekassen, then analyze the proposed digital signature architecture and standards to be used in the DiFi pilot and assess the utility and security of this solution compared to the existing Altinn "login signature".Furthermore, the candidate will try to identify one or more parts of the architecture that can be given an alternative solution, and state the arguments that support that this will be an improvement. If time allows, experimental results in software that support the claims may be carried out.