The Vulnerability of Plain HTTP

While HTTP efficiently facilitates web communication, it transmits all data in plain text, creating significant security vulnerabilities. Anyone positioned between the client and server – whether on the same network, at an internet service provider, or anywhere along the routing path – can intercept and read HTTP traffic. This vulnerability becomes critical when transmitting sensitive information like passwords, credit card numbers, personal data, or confidential business information.

Man-in-the-middle attacks represent a serious threat to HTTP communications. Attackers can not only read transmitted data but also modify it in transit. For example, an attacker could change bank account numbers in a financial transaction, inject malicious code into web pages, or redirect users to phishing sites. Without any built-in mechanism to verify data integrity or authenticate the server, HTTP provides no protection against these attacks.

Public Wi-Fi networks particularly expose HTTP vulnerabilities. When using unencrypted HTTP on public networks, other users can easily capture your traffic using readily available tools. This risk extends beyond obviously sensitive activities like online banking to include any login credentials, personal emails, or private messages sent over HTTP. Even seemingly harmless browsing can reveal personal interests, habits, and patterns that compromise privacy.