Subject: [TLS] Diversification with multiple inputs

From: "Martin Thomson" <[email-masked]>
Date: Thu, 21 Nov 2019 11:09:52 +0800

If we do the caveman thing and concatenate inputs to HKDF-Extract, what do you think we should do to the rest of the key schedule to ensure that there is diversity?

In the PSK importer draft, we use a different binder label.  Do we need diversification if there could be multiple inputs later in the key schedule?  Or is that a problem unique to PSKs?