Re: [Cbor] Unusual map labels, dCBOR and interop

[Wolf McNally <[e-mail]>]

Anders,

> On Mar 27, 2024, at 11:23 PM, Anders Rundgren <[e-mail]> wrote:
> 
> Wolf, we are in full agreement!  However, CSF (CBOR Signature Format) does pretty much the same things modulo "elision" as Gordian Envelopes, builds on CDE:
> https://test.webpki.org/csf-lab/home

It is a mis-characterization of Gordian Envelope to compare it to a “signature format” even “modulo elision". Envelope is a hierarchical binary document format built on dCBOR, that in its simplest form (as described in the I-D) supports elision (useful enough in and of itself), and in that simplest form actually has no specified way of handling signatures at all.

But Envelope also has various optional extensions (with reference implementations), many of which benefit from or rely on determinism, that support:

- Full or partial signing (embedded or detached)
- Holder-initiated elision (without invalidating signatures)
- Arbitrarily deep metadata based on recursive semantic structures
- Full or partial symmetric encryption (without invalidating signatures)
- Full or partial public key encryption (without invalidating signatures)
- Sharding using Shamir’s Secret Sharing (distributed/social backup)
- Digest decorrelation
- Inclusion proofs (progressive disclosure, herd privacy)
- Sealed transaction protocols
- Compression (without invalidating signatures)
- Diffing and merging

I suppose in a way I should thank you for your persistent mis-characterizations, because in doing so you give me the opportunity to introduce this technology to newcomers to the list.

https://www.blockchaincommons.com/introduction/Envelope-Intro/

~ Wolf