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I developed an APP in Apache Cordova (HTML5 and Javascript), which is in production and already has thousands of users, and now I need users, Portuguese citizens, to sign a document digitally. Public Administration in Portugal has a Digital Mobile Key which allows citizens to be authenticated via an SMS to their mobile phone, also allowing digital signature.
Is anyone aware of any API or code required to sign? I’m doing a lot of research, but the documentation is very scarce.
Just an update. I contacted them and presented prices for service use, prohibitive and ridiculously high. This is how the "public service".
– João Pimentel Ferreira