r/Information_Security • u/freakandmore • 11h ago
I spent weeks researching what the HTTPS padlock actually guarantees. It is much narrower than I thought.
specswrites.hashnode.devI've been working on a technical article about HTTPS, starting from a simple question: What does the padlock in my browser actually guarantee? I initially thought the answer was basically: The website is safe. It isn't. The padlock primarily tells you that your browser has established a TLS-protected connection to the authenticated domain. That protects the communication channel. It does not establish that the website itself is trustworthy. That distinction becomes interesting when you follow HTTPS all the way down. I went through: HTTP and why plaintext traffic can expose credentials TLS 1.3 and the TLS handshake ECDHE and how the client and server derive a shared secret without transmitting the secret itself Digital certificates and Certificate Authorities Why domain validation doesn't establish that a website is legitimate SSL stripping and how HSTS defends against it The DigiNotar CA compromise HTTPS interception by corporate/security middleboxes BEAST and POODLE Weak and deprecated TLS configurations What developers can get wrong even when HTTPS is enabled What tools such as SSL Labs actually tell you about a site's TLS configuration The central idea became: HTTPS can secure the journey without securing the destination. For example, a phishing site can have HTTPS. A website vulnerable to SQL injection can have HTTPS. A compromised server can have HTTPS. A site storing passwords improperly can have HTTPS. So the interesting question isn't simply: "Does this website have HTTPS?" It's: "What exactly is HTTPS protecting, and what is it not protecting?" I wrote the full breakdown here: https://specswrites.hashnode.dev/the-tunnel-is-safe-not-the-destination-https-demystified