Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
暗号学的ハッシュ関数 / Cryptographic Hash Function
Search
Kenji Saito
PRO
June 14, 2025
Technology
0
51
暗号学的ハッシュ関数 / Cryptographic Hash Function
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7回で使用したスライドです。
Kenji Saito
PRO
June 14, 2025
Tweet
Share
More Decks by Kenji Saito
See All by Kenji Saito
FinTech 3-4 : Internet Technology and Governance
ks91
PRO
0
19
民主主義と博愛(Humanitarianism) / Democracy and Humanitarianism
ks91
PRO
0
1
ブロックチェーン概論 / Introduction to Blockchain
ks91
PRO
0
6
ブロックチェーンと分散ファイナンス概論 / Introduction to Blockchain and Decentralized Finance
ks91
PRO
0
47
Proof of Authenticity of General IoT Information with Tamper-Evident Sensors and Blockchain
ks91
PRO
0
5
FinTech 1-2 : Overview of FinTech
ks91
PRO
0
14
デジタルトランスフォーメーションと民主主義 / Digital Transformation and Democracy
ks91
PRO
0
19
We Never Took the Kobayashi Maru Test Until Now. What Do You Think of Our Solutions? — Journeys of the Mind Through a No-Win Game
ks91
PRO
0
24
思いつきが武器になる:研究というゲームを始めよう / Ideas Are Your Equipments : Let the Game of Research Begin!
ks91
PRO
0
79
Other Decks in Technology
See All in Technology
後進育成のしくじり〜任せるスキルとリーダーシップの両立〜
matsu0228
7
2.5k
o11yで育てる、強い内製開発組織
_awache
3
120
リーダーになったら未来を語れるようになろう/Speak the Future
sanogemaru
0
280
研究開発部メンバーの働き⽅ / Sansan R&D Profile
sansan33
PRO
3
20k
業務自動化プラットフォーム Google Agentspace に入門してみる #devio2025
maroon1st
0
190
Shirankedo NOCで見えてきたeduroam/OpenRoaming運用ノウハウと課題 - BAKUCHIKU BANBAN #2
marokiki
0
150
Where will it converge?
ibknadedeji
0
190
神回のメカニズムと再現方法/Mechanisms and Playbook for Kamikai scrumat2025
moriyuya
4
570
Trust as Infrastructure
bcantrill
0
340
Exadata Database Service on Dedicated Infrastructure(ExaDB-D) UI スクリーン・キャプチャ集
oracle4engineer
PRO
2
5.4k
いまさら聞けない ABテスト入門
skmr2348
1
210
生成AIを活用したZennの取り組み事例
ryosukeigarashi
0
210
Featured
See All Featured
Designing for Performance
lara
610
69k
The Invisible Side of Design
smashingmag
301
51k
10 Git Anti Patterns You Should be Aware of
lemiorhan
PRO
657
61k
Building a Modern Day E-commerce SEO Strategy
aleyda
43
7.7k
[RailsConf 2023] Rails as a piece of cake
palkan
57
5.9k
KATA
mclloyd
32
15k
Balancing Empowerment & Direction
lara
4
680
Scaling GitHub
holman
463
140k
The Cost Of JavaScript in 2023
addyosmani
53
9k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
49
3.1k
Java REST API Framework Comparison - PWX 2021
mraible
33
8.8k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
140
34k
Transcript
Generated by Stable Diffusion 3.5 — 2025 7 (WBS) —
2025 7 — 2025-06 – p.1/12
https://speakerdeck.com/ks91/collections/fintech-2025-summer — 2025 7 — 2025-06 – p.2/12
( 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 7 — 2025-06 – p.3/12
LAZE SOFTWARE https://lazesoftware.com/ja/tool/hash/ SHA (Secure Hash Algorithm) SHA (NIST) (
) — 2025 7 — 2025-06 – p.4/12
( ) ( ) ↔ ← ← — 2025 7
— 2025-06 – p.5/12
( ) ( ) ( 16 ) SHA Secure Hash
Algorithm ( ) 1 : — 2025 7 — 2025-06 – p.6/12
SHA-1 https://shattered.it SHA-1 160 2017 2 Google (CWI) — 2025
7 — 2025-06 – p.7/12
H (pre-image resistance) h h = H(m) m 2 (
) (second pre-image resistance) m1 H(m1 ) = H(m2 ) m2 ( m1 = m2 ) ( ) 256 8 . . . — 2025 7 — 2025-06 – p.8/12
160 256 . . . . . . 8.8 ×
1023 km 1023+6 mm 160 1,000 103 16 1016×3 1029 mm 160 1048 1 — 2025 7 — 2025-06 – p.9/12
— 2025 7 — 2025-06 – p.10/12
50% 253 50% 23 OK n 2n 2 160 80
SHA-1 (160 ) — 2025 7 — 2025-06 – p.11/12
— 2025 7 — 2025-06 – p.12/12