gotoalberto

Lisa cipher the content to allow the possibility of restore the transaction using external tools. This is only a feature to ensure that the information can be restored.

All information are public (only for themselves) and both users can restore the operation if something goes wrong. Both users are interested on cooperate and can restore the operation from a web app or your application. Also, is higly unprobably that something as this happens, is an automated process with a restore system. The system can restore the operation (knows all information to do it).

<<I mean, it's strange that you display script outside the output. E.g. on page 7 you have 2 outputs and only one script.>> Consideer that this transaction is not been broadcasted to P2P Network. You can storage a valid transaction as this if you add the flags SIGHASH_ALL and SIGHASH_ANYONECANPAY to the transaction.

<<what does mean "description message is ciphered"? You mean signed? Because ECDSA does not do encryption (like RSA), only signatures.>> I'm not sure about your question. ECDSA is a PKI key type, so i believe that it's possible.

<<Paper is not clear on how their scripts work because they don't show exact scripts per output.>> You can found more information about contracts and the flags used on Bitcoin Wiki.

Ripple is based on social networks, in many countries these socialnetworks are prohibited as China, etc. Also, PAUV don't have a external dependencies.

because OKPay and payments processors proposed, provide an API.