Need help in Digital signature integration on a PHP Project

Required USB token based digital signature implementation for document signing on client side, Steps to fololow 1. initially user will attach/register his USB token in web based asp.net C# application. 2. At the time of document signing the application will ask user to place the registered USB token in the system. 3. The user will place the USB token in the system an d select the correct signature from the displayed screen and insert his password. 4. After this process the documents will be digitally signed. Skills: .NET, ASP.NET, C# Programming, Microsoft SQL Server, Software Architecture See more: electronic signature plugin, how to add digital signature in web application, how to create digital signature using javascript, html5 digital signature, web crypto api digital signature, javascript digital signature library, javascript digital signature pdf, javascript digital signature example, signature word document, digital signature sofware, pic based digital clock code, token based shopping carts, micro controller based digital time measurement sensor, adding signature word document, flash based digital counter, token based ecommerce, sign signature word document, digital circuit implementation analog fpga, php digital signature html forms, freelancer required find indian based manufacturer