# Ceramic - A Portable Self-Sovereign Data Network By David 2022/12/10 --- ## Vyper  ----  ----  --- ## 1. Motivation - Self-Sovereign Identity  ----  ---- ### 1.2 Motivation - OAuth  ---- ### 1.3 Motivation - Data Silos 在 Web2 世界，每用一個新的服務，就要重新教他們的系統 personalized 重新填一次喜好  ---- ### 1.4 Motivation - DB 還要自己維護 user data 跟 DB  ---- ### 1.5 Solution - Ceramic Network  ---- ### 1.6 Self-Sovereign Identity  --- ## Agenda 1. Motivation: Why We Need Ceramic Newwork? 2. Agenda 3. Concepts 1. Ceramic 2. DID 4. Examples 1. Sign In With Ethereum 2. CyberChat 3. Project Galaxy 5. Key Takeaways 6. Proposal --- ## 3. Concepts  ---- ### 3.1 Concepts - DID  ----  ----  ----  ---- ### 3.1 Concepts - DID Resolver  ---- ### 3.1 DID Resolver - Web3 DNS  ---- ### 3.1 Concepts - DID Resolver  ---- ### 3.1 DID Resolver - ETH Example The did resolver takes the ethereum address, looks at contract events and builds a DID document based on the ERC1056 Events corresponding to the address ```json { "@context": [ "https://www.w3.org/ns/did/v1", "https://w3id.org/security/suites/secp256k1recovery-2020/v2" ], "id": "did:ethr:0xb9c5714089478a327f09197987f16f9e5d936e8a", "verificationMethod": [ { "id": "did:ethr:0xb9c5714089478a327f09197987f16f9e5d936e8a#controller", "type": "EcdsaSecp256k1RecoveryMethod2020", "controller": "did:ethr:0xb9c5714089478a327f09197987f16f9e5d936e8a", "blockchainAccountId": "eip155:1:0xb9c5714089478a327f09197987f16f9e5d936e8a" } ], "authentication": [ "did:ethr:0xb9c5714089478a327f09197987f16f9e5d936e8a#controller" ], "assertionMethod": [ "did:ethr:0xb9c5714089478a327f09197987f16f9e5d936e8a#controller" ] } ``` ---- ### 3.2 Concepts - Ceramic  ---- ### 3.2 Concepts - Ceramic  ---- ### 3.2 Ceramic - Glossary | Git | Blockchain | Ceramic | | -------- | -------- | -------- | | x | Node | Anchor Service | | x | Merkle Tree | Anchor Commit | | Commit | x | Genesis/Signed Commit | ---- ### 3.2 Ceramic - Stream Lifecycle 1. Creating a stream 2. Updating a stream 3. Looking up a stream  ---- ### 3.2 Ceramic - Commit Log A Ceramic stream is made up of an append-only log of commits  ---- ### 3.3 Commit Log - Anchoring  ---- ### 3.3 Commit Log - Anchoring A tamper proof [anchoring](https://github.com/ceramicnetwork/ceramic/blob/main/SPECIFICATION.md#blockchain-anchoring)  ---- ### 3.4 Recap  --- ___ # 4. Examples 1. Sign In With Ethereum 1. CyberChat 2. Project Galaxy ---- ## 4.1 Sign in with Ethereum  ---- ## 4.1 Sign in with Ethereum  ---- ## 4.1 Sign in with Ethereum  ---- ## 4.2 CyberChat  ---- ## 4.3 Project Galaxy  ---- ## 4.3 Project Galaxy  ---- ## 4.3 Project Galaxy  --- ## 5. Key Takeaways 1. Self-Sovereign Identity 2. Ceramic Network 3. DID ---- ### 5.1 Self-Sovereign Identity We can own our own data!  ---- ### 5.2 Ceramic Network It equals DNS+Git in Web2 era  ---- ### 5.3 DID (Decentralized Identifier) Unlike URL, DID is a permanent identifier  --- # Q&A --- # 三個後區塊鏈時代不要去的產業 ---- 1. 銀行業 2. 廣告業 3. 資料庫行業 --- # 6. About Next Year's Conference https://youtu.be/PsEru7PmHU4?t=685 ---- ## Call for DAO Member to Control Multi-Sig  ----  ----  ---- ### Call for DAO Member > 我們將在 2030 年，做到「台灣區塊鏈的龍頭社群」，因為「現代社會對區塊鏈有很多誤解，我們希望這個 conf/DAO 能不分職業、種族、性別等等，平等地去普及各類區塊鏈知識」。 1. 定位：與「不知DAO」的高端市場不同，盡可能降低「演講機會、DAO治理」等參與門檻 2. 徵DAO Member：請有興趣的人來管多簽錢包 3. Call for Proposals：Use snapshot, DAOhaus or other tools for goverance? ---- ## Reference 1. resolver: ([ref](https://github.com/decentralized-identity/ethr-did-resolver#did-document)) 1. https://foresightnews.pro/article/detail/6136 2. https://www.google.com/search?q=how+to+resolve+did+into+DID+document&oq=how+to+resolve+did+into+DID+document&aqs=chrome..69i57.2481j0j1&sourceid=chrome&ie=UTF-8#fpstate=ive&vld=cid:2393ca84,vid:gf2g4O3yqCc 3. https://w3c.github.io/did-core/ 4. https://www.youtube.com/watch?v=gf2g4O3yqCc 5. DID: 非常清楚：https://www.youtube.com/watch?v=t8lMCmjPKq4 6. Ceramic 非常清楚 [spec](https://github.com/ceramicnetwork/ceramic/blob/main/SPECIFICATION.md#signed-commits) 7. Glossary: https://developers.ceramic.network/learn/glossary/#cid