[standards] Securing mechanisms section could be structured better

[Sakurann]

this is not urgent, but Securing Mechanisms section could be organized clearer I think. some thoughts:

• I think sd-bls uses data integrity, so should be moved to embedded
• would really encourage to separate crypto (BBS) from the format as much as possible (might not be always possible)
• enveloped section should probably be bulleted into JWT and SD-JWT, COSE (not sure what is a better name for mdoc), SD-CWT

[simoneonofri]

Hi @Sakurann,

Thank you for the comment:

• I re-read the paper and talked with the authors. In theory, it can be both, but the actual status is more of a signature algorithm. I'm going to move it.
• I agree that it is not an optimal organization, but it is coherent with VCDM/OIDF/OWF terminology. In theory, it should be good to have formats with crypto agility and to apply crypto algorithms (also in the Threat Model they are a different thing)
• Formatting, a nice idea, maybe also a table.