Registration requires integrity protected channel

[mitar]

Registration is the only stage in OPAQUE that requires a server-authenticated and confidential channel: either physical, out-of-band, PKI-based, etc.

I think the channel also has to protect integrity?

[chris-wood]

Perhaps this should be:

Registration is the only stage in OPAQUE that requires a server-authenticated channel with confidentiality and integrity: either physical, out-of-band, PKI-based, etc.