Update 2024-05-28-comparison.md (#2)

* Update 2024-05-28-comparison.md 1st commit (this table will be translated to Japanese) * Update 2024-05-28-comparison.md SecurityとOwnershipの箇所のコメントを追加しました！
MicroEdgeCerts · May 31, 2024 · 1227c2b · 1227c2b
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+| Item                  | Micro Edge Certificate (Proposed)                  | Open Badges              | Blockcerts                                   |
+|-----------------------|----------------------------------------------------|--------------------------|----------------------------------------------|
+| Blockchain Technology | Ethereum                                           | None                     | Bitcoin                                      |
+| Data Format           | JSON-LD                                            | JSON-LD                  | JSON-LD                                      |
+| Security              | Cryptographic signatures, PIN                      | Digital signatures       | Cryptographic signatures, Bitcoin blockchain |
+| Scalability           | Layer-2 solutions (Optimistic Rollups, zk-Rollups) | Central server-based     | Blockchain scalability issues                |
+| Ownership             | Student Owned On their device                      | Student Owned On the System | Student Owned On BitCoin / Ethereum       |
+| Interoperability      | W3C compliance, integration with existing systems  | W3C compliance           | Limited                                      |
+| User Interface        | Web and mobile-friendly, intuitive design          | Varies by implementation | Customizable                                 |
+| Validation            | パブリック鍵はBlockChain か　IPFS                    |linkか指定されたリンクでパブリック鍵 | linkか指定されたリンクでパブリック鍵   |