* Add varsig
* Change name of previously used 0xd000
* Update table.csv
Co-authored-by: Rod Vagg <rod@vagg.org>
* Fix spacing
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Co-authored-by: Rod Vagg <rod@vagg.org>
Previously, we called these foo-ns. Now we just call them foo (the fact
that they're "namespaces" is implicit.
This way, the path component always matches the multicodec name (for
both multiaddr and other path types).
Rationale:
- been around since the very early days, seems we just never added it?
- we already have dnsaddr, which works similar way, but for multiaddrs (TXT records)
- we want to support IPNS-agnostic recursive TXT values `dnslink=/dnslink/example.com`
- we need a way for pinning DNSLink names within Pinning Service API
This is an ongoing pain-point because it serves as an example of the very weird edges of the multicodec table. I'm not aware of any real use; or even how it could be practically used. It's not a "hash function", but describes a hash process that needs additional "function" information. I suspect it has its genesis in looking at Bitcoin et. al., but for those binary merkle trees we use `bitcoin-tx` coupled with `dbl-sha2-256` which gives us all the information we need.
`ssz-sha2-256-bmt` is a newer example of an entry that's more descriptive, it stretches definitions a bit here but describes a hashing process within a format. It's probably not an awesome example either, but it's closer to a standard (current) understanding of multiformats than `bmt` is (not just because it can actually be implemented and used).
Can anyone think of a good reason to keep this entry, or can we remove it as cruft?
SM2 is a set of cryptographic algorithms based on elliptic curve cryptography, including a digital signature, public key encryption and key exchange scheme.
The ISCC is similarity preserving identifier for digital content. An ISCC is derived algorithmically from the digital content itself, just like cryptographic hashes. However, instead of using a single cryptographic hash function to identify data only, the ISCC uses a variety of algorithms to create a composite identifier that exhibits similarity-preserving properties (softhash). For an implementation of code `0xcc01` see: https://iscc-core.iscc.codes/#quick-start
