Background

There are a few implementations of the ideas described in the paper “Decentralized Autonomic Data (DAD) and the three R's of Key Management”. The examples in this repository are intended to test them out.

Example 1: Minimal DAD Item (DADi)

This example shows how to create and verify a simple DADi.

Requirements

• node
• didery.js

Script

$ node create-did/createDADi.js
-- Public Key --
bae44234e6255a4ef76b80ee1c8c881e59717feedef7d169efefba316e862759
-- DAD Item --
{
  "id": "did:dad:uuRCNOYlWk73a4DuHIyIHllxf-7e99Fp7--6MW6GJ1k=",
  "changed": "2020-10-18T13:56:00.896Z",
  "geometry": {
    "coordinate": {
      "latitude": 52.520008,
      "longitude": 13.404954
    }
  }
}

C5dBSYrqTOwWu9D1HOkyGyWApDXXSlueAKqB339p2cWdhVKxfbfU0XLvsmB2w5j1D3pgwNvXGFTO4CG8VTpHDg==
--
signature:  true

Example 2: derived DID (DDID)

This example shows how to create DADi with DDID (chain + sequenz number) and verify it.

Requirements

• node
• hdkey
• eckey-utils
• didery.js

Script

$ node create-did/createDDID.js
-- Public Key --
02a47fce2176ef1e89dd81aca6cef6c070aa51d280846f4c2168e7635b546c16a9
-- DDID Database --
{
  "did:dad:AzNO6h9uaTRPk0pk-7A60cEGKAE8al8bcLUoOuDHoxFK": "did:dad:AqR_ziF27x6J3YGsps72wHCqUdKAhG9MIWjnY1tUbBap?chain=0/1"
}
-- DAD Item --
{
  "id": "did:dad:AzNO6h9uaTRPk0pk-7A60cEGKAE8al8bcLUoOuDHoxFK/1603032687",
  "changed": "2020-10-18T14:51:27.758Z",
  "geometry": {
    "coordinate": {
      "latitude": 49.981,
      "longitude": 9.276
    }
  }
}

MEUCIFLHLEmOtVKRLghVk3GdSbkN0G5b0PSTNRu4T9ksJ0cgAiEA-_Cp3pMjl91GF_Y2hLW9-XMewMYCF7SK5zdEignKNng=
--
signature:  true

Example 3: Chaining DADs

This example shows how to create DAD referencing to prior DAD.

Requirements

• node
• didery.js

Script

$ node create-did/createDADChain.js
-- Public Key --
081fc1c634526b3d3e1650a9522bd82d387132c4f0ce65f4b818df2fd8d3a129
-- DAD Item --
{
  "id": "did:dad:CB_BxjRSaz0-FlCpUivYLThxMsTwzmX0uBjfL9jToSk=",
  "changed": "2020-10-18T18:24:50.147Z",
  "address": {
    "licence": "Data (c) OpenStreetMap contributors, ODbL 1.0. https://osm.org/copyright",
    "address": {
      "village": "Waldaschaff",
      "county": "Landkreis Aschaffenburg",
      "state": "Bayern",
      "postcode": "63857",
      "country": "Germany",
      "country_code": "de"
    }
  },
  "prior": {
    "id": "did:dad:AzNO6h9uaTRPk0pk-7A60cEGKAE8al8bcLUoOuDHoxFK/1603032687",
    "sig": "MEUCIFLHLEmOtVKRLghVk3GdSbkN0G5b0PSTNRu4T9ksJ0cgAiEA-_Cp3pMjl91GF_Y2hLW9-XMewMYCF7SK5zdEignKNng="
  }
}

GDgiYzJunOFpD8cQIiI3n_qG9UxL0orp1s2_anW9FwUCmADoNIORDxZnt3Xz8d7JUuQg9aPCHOtuzo1X3TkSBg==
--
signature:  true

Example 4: Encrypting Data

This example shows how to encrypt data with keys from DADi and recipient.

Requirements

• node
• didery.js
• hdkey
• eckey-utils

Script

-- DAD Item --
{
  "id": "did:dad:Aj10lFn3QUQBTzht3yjdU5wP30GEXHK28fKSPCK8jolo",
  "changed": "2020-10-19T07:03:02.367Z",
  "payload": [
    {
      "file": "message.txt.enc",
      "content-type": "text/plain",
      "iv": "48a4531ec6e3d3fcfa7c90b1b1557b64",
      "sha256": "3376c89a19c3b1b38bcdc58587a62e1e6401c119f053d75d855c28edca652afc"
    }
  ]
}

MEYCIQDEo_WFBnEhUWYlOuKIiE1lqsjrzQ5kgtgDK-mq-rWkbwIhAP6EEnnQTdj9eYRAlsHakPjMACuQpxrYDpgH8MJezlsG
--
message.txt      d2a84f4b8b650937ec8f73cd8be2c74add5a911ba64df27458ed8229da804a26
message.txt.enc  3376c89a19c3b1b38bcdc58587a62e1e6401c119f053d75d855c28edca652afc
message.txt.dec  d2a84f4b8b650937ec8f73cd8be2c74add5a911ba64df27458ed8229da804a26 (equal:true)