# 多媒體安全 final
[TOC]

## links
- [期末report](https://docs.google.com/document/d/1CsYlKoOb9UpLX7HF96b25ZuWQ3eGAz1lYAr-OLc6aZo/edit?usp=sharing)
- [期末 slide]( https://docs.google.com/presentation/d/1lk0xQHnsjB65QLTBPieeLBeJevVj29rIhPuMBVP9fcY/edit?usp=sharing)
- [Survey report of web3
identification security issues-alanhc](https://drive.google.com/file/d/1FAQjf86xtSna83fNBge_by8XxELGrsqo/view?usp=sharing)
- [Survey report of web3
identification security issues(Techniques)-alanhc](https://drive.google.com/file/d/1pJcRhCfEYey_O0F4lPcWppJlmRgVMlFQ/view?usp=sharing)

## paper
- [Achieving Privacy and Security Using QR-Code
through Homomorphic Encryption and Steganography](https://drive.google.com/file/d/10y91yUoa01oYsziXYWNgXOUTiW3jWvVf/view?usp=sharing)
- 目的:secure banking transaction system
- ntru: 好像是otp code
- steganography: 秘密通訊

- [A privacy preserving identification protocol for smart contracts](https://drive.google.com/drive/u/0/folders/1C9CZq4qGCYIQDFG5m1jgYY0kGE21NmMP)
- 反洗錢防制
- zero knowledge proof
- [A Buyer–Seller Watermarking Protocol](https://drive.google.com/file/d/18QO8Zt1ECaGbAyAQ0IR_ASOZUPWQCYQP/view?usp=sharing)
- [An Efficient and Anonymous Buyer-Seller
Watermarking Protocol](https://drive.google.com/file/d/1hZinSscLiNQvGBa8Z5TUkIXz-C4qUOJh/view?usp=sharing)

- 
- 
- https://drive.google.com/file/d/1c0VM9BnfVYXHfDJ9qxVE7gvIDlT62ua3/view?usp=sharing

## 作業需求
消化，並講解，主要是口頭
必須知道做這件事情在這個領域的定位
要知道是否真的了解?
口頭:
動機是甚麼 為甚麼要這樣做 我的一些survey

- due date: 6/6
選擇的subject、對該領域的了解、現在別人做到甚麼地方、有甚麼想法
做出system(optional)
實作可以講performance變好/差

metaverse領域還沒有人用buyer seller protocol
metaverse怎麼要有個虛擬身分代表 可以從buyer-seller protocol
oral presentation 不要太長 30 min
感覺好像還有期末報告(?
目的: 找有興趣的領域 跨過門檻(? 自己的想法、presenatation

## 作業
本次Final需要繳交:
1.一份pdf的報告
2.一份mp4的30分鐘口頭報告，內容以投影片形式呈現
3.投影片檔案(可交可不交)
請同學把以上的檔案和其他附加的檔案(可能是source code, 實驗結果等...)打包成壓縮檔上傳至NTU COOL
一組只要派一個人繳交即可，請2人以上的組別務必在報告中明確打上你們的名字和學號！

- homomorphic encryption
- NTRU implementation: [link](https://ntru.org/software.shtml)
- error: `clang: error: the clang compiler does not support '-march=native'`
- https://stackoverflow.com/questions/65966969/why-does-march-native-not-work-on-apple-m1
- python implmentation
- https://www.youtube.com/watch?v=IiR2rVDAbLc
- ref1(py3): https://github.com/jkrauze/ntru
- `echo "hello!" | python ntru.py enc myKey.pub.npz > a.txt`
- `python ntru.py dec myKey.priv.npz a.txt`
- ref2(py2)
- 證明: https://asecuritysite.com/encryption/ntru_key
- code: https://github.com/Sapphirine/ntru
- ref(js)
- https://github.com/cyph/ntru.js
- https://npm.io/package/ntru
- QR Code
- https://towardsdatascience.com/generate-qrcode-with-python-in-5-lines-42eda283f325
- 浮水印
- DWT: https://pywavelets.readthedocs.io/en/0.2.2/ref/dwt-discrete-wavelet-transform.html
- https://towardsdatascience.com/wavelet-transforms-in-python-with-google-jax-cfd7ca9a39c6
- 讀詳細一點
- 把圖片藏在其他圖片裡 https://github.com/kelvins/steganography

## 規劃
- 5/9
- 5/16 x
- 5/23 (沒有開會)
- 5/26 (寫完報告)
- 5/30 (oral presentation+ptt)
- 6/6 作業繳交

## 5/16 開會紀錄
- 討論事項
- 浮水印的實作方式＋原理細節 - 琪琪, alanhc

## 開會紀錄 5/19
- 題目：Metaverse世界中的 buyer-seller protocol
buyer-seller protocol in metaverse
- notes
- 比較現有buyer-seller protocol及我們提出的方法

metaverse 沒有做一個好的watermarking scene
兩個虛擬人物如何取得互信，buyer-seller protocol是個很好的範例
應用: 公平交易平台

### ideas
問題
- NFT複製很容易 (NFT版權問題)
- watermark
- tract NFT 數量>避免被mint太多

- watermark鑄造NFT
- https://medium.com/centerprime/introducing-centerprime-watermark-technology-da8efc703bb0
- https://www.marksgray.com/do-you-make-nfts-what-you-need-to-know-about-copyright-protection/#:~:text=Make%20It%20Visible&text=If%20that%20feels%20too%20ugly,victor%20in%20a%20copyright%20case.
-
- In order to generate the watermark, Bob has to send a certification of his identity and his public key to the trusted watermark certification authority C and ask for a valid watermark. The watermark certification authority generates a random but valid watermark $W$ and sends to Bob $E_{K_B}(W)$, which means the watermark is encrypted by Bob’s public key.
- public key > A有沒有可能拿B的pk去watermark?
- 解決：A先對作品做sign，產生signature，然後watermark進NFT
- https://hackernoon.com/hiding-secrets-steganography-in-digital-arts-and-nfts-531z35f0
- mint的時候要檢查是否是別人複製的

## 開會紀錄 5/26

- 寫完報告：琪、alanhc
- 報告
- watermark介紹
- web3驗證、NFT問題
- 好像可以把secure QR Code加進來，確定沒有被篡改
- 題目有點像賣東西
- 流程
- 使用者收到貨物 上面有照片
- 使用者透過app，還原watermark照片成qrcode，並給server掃描
- server收到seure qr code，啟用產品，將使用者導入驗證貨品畫面（賣家、txn 資訊）
- 驗證貨物

- 5/30開會
- 完成報告
- 6/1 開會20:00
- 完成簡報、講稿
- 6/3 18:00交影片
- 6/4 20:00 檢查作業
- 6/5 12:00 (optional) 整合所有code

## 開會紀錄 6/4
https://youtu.be/jYXvBcHZ_y4
- 6/4 20:00 檢查作業
本次Final需要繳交:
- [ ] 1.一份pdf的報告 [期末report](https://docs.google.com/document/d/1CsYlKoOb9UpLX7HF96b25ZuWQ3eGAz1lYAr-OLc6aZo/edit?usp=sharing)
- [ ] 2.一份mp4的30分鐘口頭報告，內容以投影片形式呈現
{%youtube jYXvBcHZ_y4%}
- [ ] 3.投影片檔案(可交可不交) [期末 slide]( https://docs.google.com/presentation/d/1lk0xQHnsjB65QLTBPieeLBeJevVj29rIhPuMBVP9fcY/edit?usp=sharing)
請同學把以上的檔案和其他附加的檔案(可能是source code, 實驗結果等...)打包成壓縮檔上傳至NTU COOL
一組只要派一個人繳交即可，請2人以上的組別務必在報告中明確打上你們的名字和學號！
[code](https://github.com/alanhc/MMS-final)
- A group (with Maximum 3 members) tries to realize/investigate a security related final project proposed by the group members.
- The grading depends on the satisfaction of the group’s 30 mins. Oral presentation in the Final.
further investigate/realize your interested topic.
(a) a report (pdf-file)
(b) a silde presentation file (with 30mins vocal explanation recorded slide-by-slide) of (a)
(c) slides (pptx-file, optional)

請將上述(a), (b), (c)打包成壓縮檔(zip)繳交, 檔名 : 王小明_r09922XXX (name_student ID)
- frontend架構圖 https://drive.google.com/file/d/1QvHlf63WLFVCc1DkgzVw5EXrkN3KC75v/view?usp=sharing
- 博翔的參考code:https://github.com/DSR-Team/DSR-Editor
- API: https://hackmd.io/CtObjIkESoimhp5eG9XvLA
- 經堯老師的qr code參考code
- https://editor.p5js.org/jinyao.lin/full/aOIuac6fJ
- https://editor.p5js.org/jinyao.lin/full/WXA9CJ51I
## 5/16 上課slide
- e commerce
-

---



- metaverse 沒有做一個好的watermarking scene
- 兩個虛擬人物如何取得互信，buyer-seller protocol是個很好的範例
- 應用: 公平交易平台

實務面不太合理>使用者跟驗證單位去做驗證
刑事法律 要證明自己清白、對方證明 民事只需要對方證明

- 怎麼把time放進watermark很重要

## 實作
- https://stackoverflow.com/questions/19183180/how-to-save-an-image-to-localstorage-and-display-it-on-the-next-page
-