HTTP vs HTTPS – Java Backend Security Basics
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HTTP is the application protocol for requests and responses. HTTPS sends the same HTTP messages through TLS. TLS performs a handshake, authenticates the server according to certificate and trust validation, establishes shared traffic keys, then encrypts and integrity-protects the HTTP data in transit.
That prevents ordinary network observers from reading or silently modifying the exchange, provided the client validates the certificate, the endpoints and keys are not compromised, and current protocols are configured correctly. HTTPS does not hide everything—for example, IP-level metadata can remain visible—and it does not fix application flaws such as broken access control or XSS.
Ports 80 and 443 are conventional defaults rather than protocol rules. In practice, public services should redirect or remove plaintext HTTP as appropriate, use HTTPS everywhere, protect private keys, automate certificate renewal, and avoid logging secrets after TLS terminates.
HTTP vs HTTPS – Java Backend Security Basics
Direct Answer
HTTP describes the request/response protocol; HTTPS carries HTTP through TLS. TLS encrypts traffic in transit, detects modification, and authenticates the endpoint according to certificate and trust validation. It does not secure a compromised client, server, or application. Ports 80 and 443 are conventions, not protocol requirements. Public applications should use HTTPS for all traffic, especially credentials and personal data.
Code Example
# application.properties — terminate TLS in the app (often a proxy does this instead)
server.port=8443
server.ssl.enabled=true
server.ssl.key-store=classpath:keystore.p12
server.ssl.key-store-type=PKCS12
server.ssl.key-store-password=${SSL_KEYSTORE_PASSWORD}
// Redirect any plain HTTP request to HTTPS at the Spring Security layer
http.requiresChannel(c -> c.anyRequest().requiresSecure());
In production, TLS is often terminated at a load balancer/reverse proxy; the app then trusts forwarded headers.
Check your understanding
Answer these without looking back at the article.
- What three security properties does TLS provide?
- Does HTTPS protect data stored in your database?
- Why do browsers now label plain HTTP sites as 'Not Secure'?
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