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Merge pull request #45 from swcurran/tech-writer
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Abstract and Overview cleanups from a real tech writer
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swcurran authored Apr 14, 2024
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19 changes: 9 additions & 10 deletions spec/abstract.md
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The `did:tdw` (Trust DID Web) method is an enhancement to the
`did:web` protocol, providing a complementary web-based DID method that addresses limitations
of `did:web`. It's features include the following.
of `did:web`. Its features include:

- Ongoing publishing of all DID Document (DIDDoc) versions for a DID instead of,
or alongside a `did:web` DID/DIDDoc.
- Uses the same DID-to-HTTPS transformation as `did:web`.
- Provides resolvers the full history of the DID using a verifiable chain of
- The same DID-to-HTTPS transformation as `did:web`.
- The ability to resolve the full history of the DID using a verifiable chain of
updates to the DIDDoc from genesis to deactivation.
- A [[def: self-certifying identifier]] (SCID) for the DID that is globally
unique and derived from the initial DIDDoc that enables DID portability, such
unique and derived from the initial DIDDoc which enables DID portability, such
as moving the DIDs web location (and so the DID string itself) while retaining
the DID's history.
- DIDDoc updates include a proof signed by the DID Controller(s) *authorized* to
- DIDDoc updates that include a proof signed by the DID Controller(s) *authorized* to
update the DID.
- An optional mechanism for publishing "pre-rotation" keys to prevent loss of
control of the DID in cases where an active private key is compromised.
- DID URL path handling that defaults (but can be overriden) to automatically
resolving `<did>/path/to/file` by using a comparable DID-to-HTTPS translation
as for the DIDDoc.
- A DID URL path `<did>/whois` that defaults to automatically returning (if
- DID URL path handling that defaults (but can be overridden) to automatically
resolve `<did>/path/to/file` by the same DID-to-HTTPS translation.
- A DID URL path `<did>/whois` that defaults to automatically return (if
published by the DID controller) a [[ref: Verifiable Presentation]] containing
[[ref: Verifiable Credentials]] with the DID as the `credentialSubject`,
signed by the DID.

Combined, the additional features enable greater trust and security without
compromising the simplicity of `did:web`. The incorporation of the DID Core
compatible "/whois" path, drawing inspiration from the traditional WHOIS
protocol [[spec:rfc3912]], offers an easy to use, decentralized, trust registry.
protocol [[spec:rfc3912]], offers an easy-to-use, decentralized, trust registry.
The `did:tdw` method aims to establish a more trusted and secure web environment by
providing robust verification processes and enabling transparency and
authenticity in the management of decentralized digital identities.
27 changes: 14 additions & 13 deletions spec/overview.md
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Expand Up @@ -4,7 +4,7 @@ The evolution of [[ref: Decentralized Identifiers]] ([[ref: DID]]) continues to
be a dynamic area of development in the quest for secure and private digital
identity management. The `did:web` method, praised for its simplicity and ease
of deployment, allows for DIDs to be associated with a domain's reputation or
published on platforms like GitHub. However, it is not without its challenges
published on platforms such as GitHub. However, it is not without its challenges--
from trust layers inherited from the web and the absence of a verifiable history
for the DID. Addressing these concerns, the proposed `did:tdw` (Trust DID Web)
method aims to enhance `did:web` by introducing a verifiable history feature,
Expand Down Expand Up @@ -40,14 +40,15 @@ DID. For resolvers that want more assurance, `did:tdw` provides a way to "trust
did:web" (or to enable a "trusted web" if you say it fast) enabled by the
features listed in the [Abstract](#abstract).

The following is a `tl;dr` summary of how `did:tdw` works.
The following is a `tl;dr` summary of how `did:tdw` works:

1. In the same path as where DID resolvers find a `did:web`'s `did.json`,
`did:tdw`'s `did.jsonl` ([[ref: JSON Lines]]) file is found. The same `did:web` DID-to-HTTPS
transformation is used.
1. `did:tdw` uses the same DID-to-HTTPS tranformation as `did:web`, so
`did:tdw`'s `did.jsonl` ([[ref: JSON Lines]]) file is found in the same
location as `did:web`'s `did.json` file.
2. The `did.jsonl` is a list of JSON [[ref: DID log entries]], one per line,
whitespace removed, each of which contains the information needed to derive a
version of the DIDDoc from its preceding version.
whitespace removed (per [[ref: JSON Lines]]), each of which contains the
information needed to derive a version of the DIDDoc from its preceding
version.
3. Each entry includes six JSON entries:
1. A hash of the entry.
2. The `versionId` of the DIDDoc, starting from 1 and incrementing.
Expand Down Expand Up @@ -91,12 +92,12 @@ The following is a `tl;dr` summary of how `did:tdw` works.
An example of a `did:tdw` evolving through a series of versions can be seen in
the [did:tdw Examples](#didtdw-example) of this specification.

This draft specification was developed in parallel with the development of two proof
of concept implementations. The specification/implementation interplay helped
immensely in defining a practical, easy to use, easy to understand, DID method.
The existing proof of concept implementations of the `did:tdw` DID Method are
listed in the [Implementors Guide](#Implementations). The current Typescript
implementation is less than 1000 lines of Typescript code.
This draft specification was developed in parallel with the development of two
proof of concept implementations. The specification/implementation interplay
helped immensely in defining a practical, intuitive, straightforward, DID
method. The existing proof of concept implementations of the `did:tdw` DID
Method are listed in the [Implementors Guide](#Implementations). The current
Typescript implementation is less than 1000 lines of Typescript code.

### The `/whois` Use Case

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