Article Preview
Top1. Introduction
The vast evolution of the communication and networks in the last two decades changed the way our world works drastically (Srivastava, 2013). Using signature in paper transactions has been spread over the last years as a way of gaining assurance of the identity and authority of the parties involved in a contract (Sumroy and Sherrard, 2012). Electronic communication methods such as Email and the Internet make it potential to execute contracts. The most important formal requirements are the signature; therefore, a contract requiring a signature need to be able to do so electronically (Laborde, 2010). Digital Signature that is defined as an electronic data that is logically associated with or attached to other data in electronic form and that is considered as an authentication method (United Nations Publication, 2009). Also, a digital signature is an arithmetical model used to validate the authenticity and integrity of a digital document, message, or software (Martoni and Palmirani, 2013). Including assurance as to its authenticity even if later the verifying party or signer tries to deny (Chiranth and Shashikala, 2012). Because of the Internet's security protection holes, several of the digital community members explored how to allocate risk if a security breach were to occur. From this investigation, three main issues were identified as security risks: integrity, nonrepudiation, and authentication (Stern, 2001).
Digital signature should provide three main services: Authentication which is linking the creator of the information, Integrity, which means easily detecting any variations to the information provided and Non-repudiation for making sure of the satisfaction (from a legal perspective) about where the electronic signature is coming from (Wang, 2014). Digital signature laws had three generations, which started appearing since 1995 (Blythe, 2007; Embrogno, 2012). Moreover, mobile signatures are predicted to get a great future. To grant signatory mobility apart from a fixed, secure desktop workstation that has a trusted, personal signing tool (Rossnagel and Royer, 2005), and because of how smart devices are taking over PC’s a need for signature applications emerge and many applications started to hit the different markets (Google Play, App Store and windows store).