Upgrade to Pro — share decks privately, control downloads, hide ads and more …

デジタル署名 / Digital Signature

Avatar for Kenji Saito Kenji Saito PRO
June 14, 2025
Technology
68
0

デジタル署名 / Digital Signature

早稲田大学大学院経営管理研究科「フィンテック ─ 金融革新とインターネット」2025 夏のオンデマンド教材 第8回で使用したスライドです。

Avatar for Kenji Saito

Kenji Saito PRO

June 14, 2025

More Decks by Kenji Saito

See All by Kenji Saito
ロボティクスの技術 / Robotics Technology
Avatar for Kenji Saito ks91
PRO
0
14
インシデントレスポンス演習 I / Incident Response Exercise I
Avatar for Kenji Saito ks91
PRO
0
22
責任 2.0/3.0 ∼ 知的創造過程の脱領土化 / Responsibility 2.0/3.0 - The Deterritorialization of the Intellectual Creative Process
Avatar for Kenji Saito ks91
PRO
0
9
エージェント化するAI：現在地とその先に起きる変化 〜 おかわり / AI as Agents: The Current State and the Changes Ahead - a second helping
Avatar for Kenji Saito ks91
PRO
0
27
金融テクノロジーのガバナンス / Governance of Financial Technology
Avatar for Kenji Saito ks91
PRO
0
50
セキュリティの基礎とインシデントレスポンス / Security Fundamentals and Incident Response
Avatar for Kenji Saito ks91
PRO
0
87
やり抜く力を見せるエージェントたち / Agents Who Demonstrate Perseverance
Avatar for Kenji Saito ks91
PRO
0
35
ブロックチェーン / Blockchain
Avatar for Kenji Saito ks91
PRO
0
120
デジタルとコミュニケーション / Digital and Communication
Avatar for Kenji Saito ks91
PRO
0
53

Other Decks in Technology

See All in Technology
Bucharest Tech Week 2026 - Reinventing testing practices in the AI era
Avatar for Eric Deandrea edeandrea
PRO
1
140
作って終わりにしない タイミーのセマンティックレイヤー育成の現在地
Avatar for chanyou0311 chanyou0311
4
2.2k
AGENTS.mdとSkillsで始めるAIエージェント活用
Avatar for そのだ sonoda_mj
3
200
2026TECHFRESH畢業分享會 - Lightning Talk - 資料也要 CI/CD? 用 Airbyte 自動化資料同步
Avatar for LINE Developers Taiwan line_developers_tw
PRO
0
800
Building applications in the Gemini API family.
Avatar for LINE Developers Taiwan line_developers_tw
PRO
0
3k
Android の公式 Skill / Android skills
Avatar for Yuki Anzai yanzm
0
130
小さく始める AI 活用推進 ― 日経電子版 Web チームの事例/nikkei-tech-talk47
Avatar for 日本経済新聞社 エンジニア採用事務局 nikkei_engineer_recruiting
0
220
データサイエンスを価値につなげるプロジェクト設計 〜 DS一年目が現場で得た気づき 〜
Avatar for Yusei Doi ysd113
1
180
Claude Code×Terraform IaC テンプレート駆動開発
Avatar for Itou Hideki itouhi
1
490
Amazon Bedrock AgentCore ワークショップ JAWS UG TOHOKU / amazon-bedrock-agentcore-workshop-jawsug-tohoku-2026
Avatar for geeawa gawa
9
690
NAB Show 2026 動画技術関連レポート / NAB Show 2026 Report
Avatar for CyberAgent cyberagentdevelopers
PRO
0
170
On-behalf-of Token exchange with AgentCore Identity
Avatar for iganin hironobuiga
2
150

Featured

See All Featured
How STYLIGHT went responsive
Avatar for nonsquared nonsquared
100
6.2k
Why Mistakes Are the Best Teachers: Turning Failure into a Pathway for Growth
Avatar for Umar Saidu Auna auna
0
160
Rails Girls Zürich Keynote
Avatar for Gregor Martynus gr2m
96
14k
YesSQL, Process and Tooling at Scale
Avatar for Rocio Delgado rocio
174
15k
Bootstrapping a Software Product
Avatar for Garrett Dimon garrettdimon
PRO
307
120k
Lightning talk: Run Django tests with GitHub Actions
Avatar for Sarah Abderemane sabderemane
0
200
Noah Learner - AI + Me: how we built a GSC Bulk Export data pipeline
Avatar for Tech SEO Connect techseoconnect
PRO
0
200
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
Avatar for mongodb mongodb
49
10k
Designing Dashboards & Data Visualisations in Web Apps
Avatar for Des Traynor destraynor
231
55k
Designing for Performance
Avatar for Lara Hogan lara
611
70k
Data-driven link building: lessons from a $708K investment (BrightonSEO talk)
Avatar for Szymon Słowik szymonslowik
1
1.1k
The Limits of Empathy - UXLibs8
Avatar for Cassini Nazir cassininazir
1
350

Transcript

  1. Generated by Stable Diffusion 3.5 — 2025 8 (WBS) —

    2025 8 — 2025-06 – p.1/9

  2. https://speakerdeck.com/ks91/collections/fintech-2025-summer — 2025 8 — 2025-06 – p.2/9

  3. ( 20 ) 1 ↑ • 2 ↓ 2025 •

    3 • 4 (TCP/IP ) • 5 • 6 • 7 • 8 ↑ • 9 ↓ 2024 ( ) 10 World Wide Web 11 Web API 12 * 13 git GitHub 14 (6/23 ) / (2 ) OK / — 2025 8 — 2025-06 – p.3/9

  4. — 2025 8 — 2025-06 – p.4/9

  5. (RSA ) RSA (RSA : Rivest, Shamir, Adleman) . .

    . . . . ECDSA ( DSA : Digital Signature Algorithm) - — 2025 8 — 2025-06 – p.5/9

  6. ( ) < , > ← ( ) ← :

    < , > : : < , , > : OK ( 1 ) NG ( ) — 2025 8 — 2025-06 – p.6/9

  7. ( ) ← CA (Certificate Authority; ) — 2025 8

    — 2025-06 – p.7/9

  8. CA ( ) . . . 1. 2. ( )

    3. (↑) ↑ — 2025 8 — 2025-06 – p.8/9

  9. — 2025 8 — 2025-06 – p.9/9