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案张
4 years ago
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1 年老老葉路料來了料數利來料料金來利金理數料料行度利度量識度數數異數立數路料來路路不便利廉若利不例列行領裡例 - 1 -

2 金料路利金料不年年金識金利金來料路易 PKI 金金金理金來路料易行來料不 PKI 金便行 Step:1 Check UserB s CA Check UserA s Step:6 Public Key Center Public Key Step:2 Step:7 Get UserB s Public Key Step:3 Encrypt UserA Signature with Signature UserA s Private Key Original Step:4 Encrypt Document Encrypt with Document UserB s Public Key Get UserA s Public Key Step:5 UserB Delivery Document Step:9 Step:8 Decrypt with Encrypt Private Key Signature Decrypt with UserA s Public Key Step:10 Identify UserA s Signature Encrypt Document 流理 Original Document Compare these two Identification - 2 -

3 行裡易讀來行料理度料易料 Sender Plaintext M Receiver Plaintext M Encryptor E Key1 M =Dk1(C) Decryptor D C=Ek1M Ciphertext C Internet C=Ek1M Ciphertext C 年兩不不不例不 Sender Plaintext M Encryptor E C=Ek1M Ciphertext C Key1 Internet Receiver M=DK2C C=Ek1M Plaintext M Decryptor D Ciphertext C Key2 年數度例數例說兩數令數兩數數流 - 3 -

4 若理率不易行不若數數度數數路六數數利理論不數例說金路數若路料若金 Order Form Name UserA Digital Signature Internet ISP Server UserA s Private Key UserA Order Form Name UserA Digital Signature Encryption Function UserA s Public Key Decryption Function UserA Information Comparison 數流理 same Information Correct different Information Incorrect - 4 -

5 力數來不金料金若理金 PKI 金理行理理行理行理行料料兩理來例理來理若例 Post Office Protocol Version 連離讀量 Sample Mail Transfer 來 Internet Message Access Protocol 不路讀不行讀例不易易 - 5 -

6 易若行來行若列若裡利金不易不易易識利數來不行留不 PGPPretty Good Privacy 年金行金 PEMPrivacy Enhanced Mail 路行良利來不料金 S/MIME 了不爲了讀識略兩了欄 - 6 -

7 利欄來爲了欄列列列來行列列列列列參數不不例 ~ 老爲例不料行爲了不料狀例年蘭年領讀來年蘭領了路例數利兩路路 0% 10% 20% 30% 40% 50% 60% 70% 80% 利領來 2-6 利 PKI 領來 PKI 領不類路路路 27% 35% 51% 73% 76% 0% 20% 40% 60% 80% 100% 37% 36% 54% 58% 60% 11% 14% 19% 10% 10% 11% 8% 31% 20% 16% 16% 33% 14% 36% 金來 8% - 7 -

8 PKI 度領數麗林隆理路識兩理論料度年歷度練類識數念了度參度年年年歷度類金識行不度異不度異識行行行理料料量數數不女度年歷數數數立來度 - 8 -

9 數數不度異了不度異立不度異女女女女女度度異數數不度異不不異年不年度異了不年度異立不年度異料不年度異不年不異 3. 不度異不年度異立 H1c 不度異料不度異不不異歷不歷度異不歷度異立 H1d 不歷度異不歷度 - 9 -

10 歷度異數度不數度異了不數度異立 H1f 不數度異異不歷不異立 5. PKI 練不練度異不練度異立 H1e 不 PKI 練度異練度異數度不練度異不練識度異立 6. 數數度度異數不數度異異更異更度度立度類利

11 來度 1. 不度異了不度異立 H2a 不度異料不度異不異 H2a 立 2. 類不類度異了不類度異立 H2b 不類度異料不類度異不類不異 H2b 3. 不度異了不類度異立 H2c 不度異料不度異不不異 H2c 識異識兩利來兩兩連立 H3 識數來識識識識識兩

12 識度 H3 度 1 不度異 2 年不年度異 3 不度異 4 歷不歷度異 5PKI 練不 PKI 練度異 6 數不數度異識數度異異數異數行數料例 PKI 識歷練數異練數識度異識歷練數異練數度度練數度 PKI 領列領識年度狀例來更流領更良 PKI

13 練不練練不論來行行理量理理省不度金數不良度率路理論麗路理林隆路路理祿李 : 理論亮立路金龍瑩立論林路例理論李隆立論麟金例論立林論年北北理

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untitled 金度金度金度金度契列行行行利列行年來利率見年金金列見類金理不利率列不金不金立理金列理行金理利率度不金不列類量類不不類列金來利來金來累列不金立理金金力金不 1/25 列不不金立不領金列不金金金金立理利列力力離列