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IEEE/ICACT20220023 Question.4 Questioner: kakikura_sayoko@sec.ee.kagu.tus.ac.jp 2022-02-14 오후 1:41:41	IEEE/ICACT20220023 Answer.4 Answer by Auhor jianms@nfu.edu.tw 2022-02-14 오후 1:41:41
Thank you for your presentation. I would like to know more about the blockchain's unique private key that you mentioned in slide 20. Sorry for the naive question, but how apply the private key to the blockchain? Is it like salt or pepper in cryptography?	Thanks for your question. According to the face recognition results, each face would be represented as the sequential numbers. Different faces would be corresponding to individual numbers. Therefore, based on the first time face recognition result, the sequential numbers of this face would be recorded in the database. When the face is recognized again and matches the recorded face in the database, then the recorded sequential numbers would be used as the private key for blockchain.

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