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暗号学的ハッシュ関数 / Cryptographic Hash Function

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Avatar for Kenji Saito Kenji Saito PRO
June 07, 2026
Technology
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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「サイバーセキュリティ」2026夏のオンデマンド教材 第7回で使用したスライドです。

Avatar for Kenji Saito

Kenji Saito PRO

June 07, 2026

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Transcript

  1. Generated by Stable Image Core 2026 7 (WBS : )

    2026 7 — 2026-06 – p.1/12

  2. https://speakerdeck.com/ks91/collections/cyber-security-2026-summer 2026 7 — 2026-06 – p.2/12

  3. ( 20 ) 1 • 2 • 3 • 4

    (TCP/IP ) • 5 • 6 • 7 • 8 9 10 World Wide Web 11 Web API 12 13 git GitHub 14 / / OK / 2026 7 — 2026-06 – p.3/12

  4. LAZE SOFTWARE https://lazesoftware.com/ja/tool/hash/ SHA (Secure Hash Algorithm) SHA (NIST) (

    ) 2026 7 — 2026-06 – p.4/12

  5. ( ) ( ) ↔ ← ← 2026 7 —

    2026-06 – p.5/12

  6. ( ) ( ) ( 16 ) SHA Secure Hash

    Algorithm ( ) 1 : 2026 7 — 2026-06 – p.6/12

  7. SHA-1 SHA-1 160 2017 2 Google (CWI) 2026 7 —

    2026-06 – p.7/12

  8. H (pre-image resistance) h h = H(m) m 2 (

    ) (second pre-image resistance) m1 H(m1 ) = H(m2 ) m2 ( m1 = m2 ) ( ) 256 8 . . . 2026 7 — 2026-06 – p.8/12

  9. 160 256 . . . . . . 8.8 ×

    1023 km 1023+6 mm 160 1,000 103 16 1016×3 1029 mm 160 1048 1 2026 7 — 2026-06 – p.9/12

  10. 2026 7 — 2026-06 – p.10/12

  11. 50% 253 50% 23 OK n 2n 2 160 80

    SHA-1 (160 ) 2026 7 — 2026-06 – p.11/12

  12. 2026 7 — 2026-06 – p.12/12