HTTPSllä

HTTPSllä is a term used to describe a policy or approach in which all web traffic to a site or service is transmitted exclusively over HTTPS. The term is most commonly used in Swedish-speaking discussions, but the concept is global: it aims to ensure confidentiality, integrity, and authenticity of data in transit by encrypting HTTP with TLS.

HTTPS, or HTTP over TLS, encrypts requests and responses to prevent eavesdropping, tampering, and impersonation. HTTPSllä emphasizes enforcing HTTPS across the entire site, including subresources, and phasing out nonsecure HTTP.

Implementation typically involves obtaining TLS certificates from a trusted authority, configuring strong TLS settings (prefer TLS 1.3, disable older protocols), and redirecting all HTTP requests to HTTPS with 301 redirects. Enforcing this policy further can be aided by HTTP Strict Transport Security (HSTS), which tells browsers to only use HTTPS for future requests to the domain. Ongoing certificate management and automation (for example through Let’s Encrypt) reduce operational burden.

Security and limitations: HTTPS protects data in transit but does not secure data at rest, nor does it prevent phishing, social engineering, or server-side vulnerabilities. HTTPS configurations can fail if there is mixed content, misissued certificates, or improper TLS configurations.

Adoption and impact: The shift to HTTPS has accelerated across the web, with major browsers encouraging or enforcing secure connections for many features. HTTPS is foundational for modern web protocols like HTTP/2 and HTTP/3. Related topics include TLS, HSTS, Let’s Encrypt, HTTP/2, and HTTP/3.