[COSE] tstr values for kty, alg, crv, etc.

[AJITOMI Daisuke <[e-mail]>]

Hi folks,

I am an open source CWT/COSE library (Python CWT:
https://github.com/dajiaji/python-cwt) implementer.
I've already implemented most of the functionality of COSE and CWT, but
there are a few things I would like to clarify.

One of the questions I have is the 'tstr' values for 'kty', 'alg', 'crv',
or 'key_ops' which have the type definition "tstr / int".

At first, I thought "Name" values defined in the IANA registries should be
used, but for example, RFC8152 (Section 16.2) says as follows:

"Name: The name is present to make it easier to refer to and discuss the
registration entry. The value is not used in the protocol."

In my opinion, the tstr type for 'kty', 'alg', 'crv' or 'key_ops' is not
necessary because I think the major advantage of COSE is its
compactness,but I would like to know what you are assuming as the value of
tstr.

I apologize if this topic has already been discussed.

Regards,
Daisuke