Am Donnerstag 18 März 2021 14:54:13 schrieb Giel van Schijndel:
But until finding a relatively cheap way to access the specification's text at least your crypto question isn't answerable.
https://www.gsma.com/futurenetworks/universal-profile-thank-you/ seems to have at least the 260 pages Official Document RCC.71 - RCS Universal Profile Service Definition Document but it needs a corresponding technical specification and a search on the website brings up a number of document, e.g. https://www.gsma.com/newsroom/resources/rcc-20-enriched-calling-technical-sp...
It could just be there on the website. :) Bernhard