MedLabML is a startup firm that moves patient data between different care providers to provide a "single patient view". They use a B2B system to exchange electronic business document with their key suppliers. They are seeking your advice about standards to review for improving their messagelevel security.
Which standard or API would you recommend they read?
A. SAML 1.1
B. Web Service Interoperability Technology
C. XML Signature
D. SSL