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 Functions
Search
Sponsored
·
Ship Features Fearlessly
Turn features on and off without deploys. Used by thousands of Ruby developers.
→
Kenji Saito
PRO
June 15, 2024
Technology
0
170
暗号学的ハッシュ関数 / Cryptographic Hash Functions
早稲田大学大学院経営管理研究科「サイバーセキュリティ」2024 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 15, 2024
Tweet
Share
More Decks by Kenji Saito
See All by Kenji Saito
AI 前提社会におけるトラスト / Trust in an AI-Driven Society
ks91
PRO
0
7
非営利組織の起業/発表と総括 / Starting up a Nonprofit Organization, Presentation and Summary
ks91
PRO
0
56
自己開発 / Self-Development
ks91
PRO
1
17
あなたは何によって憶えられたいですか? / What Do You Want to be Remembered for?
ks91
PRO
0
21
ボランティアと理事会 / Volunteers and Board of Directors
ks91
PRO
0
42
メタ・ネイチャーポジティブへの道 / The Path to Meta Nature Positive
ks91
PRO
0
34
アカデミーキャンプ2026 初春「ミライ、ゲーミファイ」DAY 3 / Academy Camp 2026 Early Spring "GAMIFY THE FUTURE!!" DAY 3
ks91
PRO
0
50
アカデミーキャンプ2026 初春「ミライ、ゲーミファイ」DAY 2 / Academy Camp 2026 Early Spring "GAMIFY THE FUTURE!!" DAY 2
ks91
PRO
0
85
アカデミーキャンプ2026 初春「ミライ、ゲーミファイ」DAY 1 / Academy Camp 2026 Early Spring "GAMIFY THE FUTURE!!" DAY 1
ks91
PRO
0
82
Other Decks in Technology
See All in Technology
OCI Database Management サービス詳細
oracle4engineer
PRO
1
7.4k
15 years with Rails and DDD (AI Edition)
andrzejkrzywda
0
180
データの整合性を保ちたいだけなんだ
shoheimitani
8
3k
変化するコーディングエージェントとの現実的な付き合い方 〜Cursor安定択説と、ツールに依存しない「資産」〜
empitsu
4
1.3k
ブロックテーマでサイトをリニューアルした話 / 2026-01-31 Kansai WordPress Meetup
torounit
0
460
GitHub Issue Templates + Coding Agentで簡単みんなでIaC/Easy IaC for Everyone with GitHub Issue Templates + Coding Agent
aeonpeople
1
190
Data Hubグループ 紹介資料
sansan33
PRO
0
2.7k
小さく始めるBCP ― 多プロダクト環境で始める最初の一歩
kekke_n
1
360
What happened to RubyGems and what can we learn?
mikemcquaid
0
250
Introduction to Bill One Development Engineer
sansan33
PRO
0
360
こんなところでも(地味に)活躍するImage Modeさんを知ってるかい?- Image Mode for OpenShift -
tsukaman
0
110
Digitization部 紹介資料
sansan33
PRO
1
6.8k
Featured
See All Featured
Building Flexible Design Systems
yeseniaperezcruz
330
40k
How to Grow Your eCommerce with AI & Automation
katarinadahlin
PRO
0
100
Speed Design
sergeychernyshev
33
1.5k
16th Malabo Montpellier Forum Presentation
akademiya2063
PRO
0
49
A better future with KSS
kneath
240
18k
Jess Joyce - The Pitfalls of Following Frameworks
techseoconnect
PRO
1
63
Joys of Absence: A Defence of Solitary Play
codingconduct
1
290
Fantastic passwords and where to find them - at NoRuKo
philnash
52
3.6k
Rails Girls Zürich Keynote
gr2m
96
14k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
9
1.2k
Build your cross-platform service in a week with App Engine
jlugia
234
18k
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
122
21k
Transcript
Hardening for cyber security — generated by Stable Diffusion XL
v1.0 2024 7 (WBS) 2024 7 — 2024-06 – p.1/12
https://speakerdeck.com/ks91/collections/cyber-security-2024-summer 2024 7 — 2024-06 – p.2/12
( 20 ) 1 • 2 • 3 • 4
(TCP/IP ) • 5 • 6 • 7 • 8 9 10 World Wide Web 11 Web API 12 13 git GitHub 14 (6/24 ) / (2 ) OK / 2024 7 — 2024-06 – p.3/12
LAZE SOFTWARE https://lazesoftware.com/ja/tool/hash/ SHA (Secure Hash Algorithm) SHA (NIST) (
) 2024 7 — 2024-06 – p.4/12
( ) ( ) ↔ ← ← 2024 7 —
2024-06 – p.5/12
( ) ( ) ( 16 ) SHA Secure Hash
Algorithm ( ) 1 : 2024 7 — 2024-06 – p.6/12
SHA-1 https://shattered.it SHA-1 160 2017 2 Google (CWI) 2024 7
— 2024-06 – 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 . . . 2024 7 — 2024-06 – p.8/12
160 256 . . . . . . 8.8 ×
1023 km 1023+6 mm 160 1,000 103 16 1016×3 1029 mm 160 1048 1 2024 7 — 2024-06 – p.9/12
2024 7 — 2024-06 – p.10/12
50% 253 50% 23 OK n 2n 2 160 80
SHA-1 (160 ) 2024 7 — 2024-06 – p.11/12
2024 7 — 2024-06 – p.12/12