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    --- title: SITCON 2017 R1 共筆 tags: SITCON 2017 共筆, 2017 --- # SITCON 2017 R1 共筆 * 直播傳送門 {%youtube 0zTpUJn-2AQ %} * Markdown 標記語言語法參考:<http://markdown.tw> * 非官方 slideshot 上傳中,如講者或 SITCON 官方有疑慮請連繫V字龍 &lt;<Vdragon.Taiwan@gmail.com>&gt; (Telegram: @Vdragon) ## cjdns: 重新發明網路 — ming cjd's network suite - 現有網路的缺點: ![](http://i.imgur.com/guifrUp.png) ### 重新發明網路應該要有的特點 - 好使用(無須設定) - 加密 everything - easy to scale up - everyone is equal - 有選擇 ISP 的權利 - 所有節點都是對等的 可以依賴近幾年才發展的新東西來重新設計 ### 公私鑰 review: - 公鑰公開、私鑰保留,大家用公鑰加密,用自己的私鑰解密 - digital signature(私鑰簽名、公鑰驗證) - **==可以拿來產生 IP==** - 當要傳遞訊息給某 IP ,只要使用該 IP 對應的公鑰加密傳給對方即可 - 實務上會很慢,可以使用curve25519,salsa20,poly1305演算法處理 - 以session方式解決私鑰竊取問題,達成 [Forward Secrecy](https://zh.wikipedia.org/zh-tw/前向安全性) ### 舊有的 IP 系統是跟現實位置有關的 - 使用分散式雜湊表 (Distributed hash table, DHT) -> 實現舊routing - key: IP address - value: How to route to target IP address - DHT 適合 Source routing ### HOPS 網路類型: - Regular - 只跟相鄰節點傳遞訊息 - Small-world - 只跟自己的小圈圈 - Random - 隨機跟群體的人建立連線 ## 格鬥遊戲 AI 開發經驗談 — 阿哲 - Rule Based & Genetic Algorithm(基因演算法) - Problem: - 敵人模式 - 動作傾向 - 部分動作的效果特別有效 - 正確判斷的方式 - 未判斷地帶 - 策略轉換 - rule組應對的不是很好 轉換了還是輸 - 偵測效果不佳 對手動作類型不固定 - 轉換時機 大勢已去 - 解決問題的方式 - 賽局理論 --> 見招拆招的策略 - 格鬥遊戲AI的特點 - 熟悉遊戲 - 看比賽紀錄來踹 - 2016 IEEE CIG 新挑戰:兩個新角色 - 給出動作資料 - 無動作資料 --> 遊戲當天才知道 - 蒙地卡蘿莉樹搜尋(MCTS) 1.需要時間累積 2.探索未知的解 3.優勢時有恃無恐 ## 十分鐘認識 MMR — PineApple Kao 解決模運算的快速乘法 - Modular Operation - $0 \equiv 13$ (mod13) - $1 \equiv 14$ (mod14) - .... - Why We need MMR? - RSA - $c \equiv m^e$ - Encryption - Montgomery Reduction - R>N, GCD(R,N) = 1 - R(N-1) 代表 (N-1)的等價類 - $\frac{T+(TN^-1\;mod\;R)N}{R}<\frac{N^2+RN}{R}<2N$ - Recall:R>N,GCD(R,N)=1 - 討厭的mod N長除法, 會變成一次判斷跟一個減法 - ## 從零開始的線上字型 — 陳昱維/千秋 - 投影片: http://slides.com/akira02/re0#/ - 字體的重要性 - 以文字貢獻社會 - 字體是人一個字一個字畫出來的 - 字體製作軟體:Fontlab Studio 5 (較困難) - [Glyphs](https://glyphsapp.com/) - 字體規格 - OTF - TTF - Auto Hinting - WOFF - 網頁字型 - WOFF2 - WOFF (支援度廣、壓縮不足) - EOT - 支援 IE9 以下 - TTF - Check it on Caniuse.com - unicode-range 子集內嵌 - Web font 壓縮 - 包含拉丁字大小寫和各種符號 - 字符數量比西方語言多很多 - 上看一萬三千字,以mb為單位 - font-spider.org - 不支援黑魔法字形 (?) - 推薦的開源字體 - 思源黑體(Noto) - 花園明朝 - M+ Font - 線上字體Solution - Typekit - Google fonts - TypeSquare - Justfont - 文鼎雲字形 - 系統內建字體選用指南 - Meiro - Link:http://slides.com/akira02/re0 ## BGP Hijacking: new ways to mass surveillance — Licson - 投影片:http://slides.com/licson/bgp-hijacking-new-ways-to-mass-surveli ## 從 QA 到 QQ - QA 實習經驗與測試技巧 — Louie Lu [Louie Lu](https://blog.louie.lu/) ### 自動化測試 Web & API #### Robot framework 特色 + ATDD + 不會處理 unit test + 自動產生 report + 支援 py2, py3 + 很好擴充 custom library + open source 缺點 + debug 麻煩, 耗時 + 如果到中間出現 failed, 需要重新跑一遍 + 需要學習他的 keywords #### pi-tester 特色 + 很輕巧 + template (可以複製貼上) #### 如果想成為一位 QA, 可以掌握以下技能 + python + selenium library + xpath ### 什麼是 QA? + 提供新的觀點 + 期望在產品上線之前就會找到 bug #### QA還可以做什麼 + release automation + test cases design + CI + 測試的方法

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