HTTPS は TLS暗号化 で保護されたHTPであり、ブラウザとサーバー間のデータを暗号化して盗聴と改ざんから保護し、サーバーのアイデンティティを検証します。センシティブデータを扱うあらゆるサイト(そして現在はすべてのサイト)に不可欠です。
HTTPSが提供するもの
HTTPS = HTTP over TLS (Transport Layer Security). It provides:
✓ ENCRYPTION → data in transit is encrypted → eavesdroppers can't read it (passwords,
data, cookies are protected on the network)
✓ INTEGRITY → data can't be tampered with in transit (detect modification)
✓ AUTHENTICATION → verifies the server's identity (via certificates) → you're talking
to the real site, not an impostor (prevents man-in-the-middle)
なぜ重要なのか
Without HTTPS (plain HTTP), data travels in PLAINTEXT:
✗ anyone on the network (public WiFi, ISPs, attackers) can READ it → steal passwords,
session cookies, personal data
✗ data can be MODIFIED in transit (inject content, tamper)
✗ no way to verify the server is genuine (impersonation/MITM attacks)
→ HTTPS protects against all of these — essential for security and privacy.
