It's unclear to me how transaction signing and transaction authentication work.
Industrial solutions use both symmetric and asymmetric algorithms to compute the signature.
- What does RSA add the one-timeness to the transaction?
- What are the advantages of symmetric vs. asymmetric algorithms for transaction signing?
- If an ORCA based OTP generator is used and the account number/amount is used as datainput with a moving factor (timestep for instance) is this considered a good transaction signature?