SSL (Secure Sockets Layer)

SSL (Secure Sockets Layer) is a cryptographic protocol that encrypts data transmitted between a web server and a browser. Although its modern successor is TLS (Transport Layer Security), the term "SSL" remains the standard shorthand for encrypted web connections. When a website uses SSL/TLS, its URL begins with "https://" and browsers display a padlock icon in the address bar. The protocol works by establishing a secure handshake between client and server, exchanging encryption keys, and then transmitting all data through an encrypted tunnel that prevents eavesdropping, tampering, or forgery during transit.

SSL encryption is non-negotiable for any website that handles sensitive data. It protects login credentials, payment information, form submissions, and personal data from interception by third parties. For digital publishers specifically, SSL builds reader trust — browsers now display prominent "Not Secure" warnings on pages served over plain HTTP, which immediately drives visitors away. Google also uses HTTPS as a ranking signal, meaning unencrypted sites face both security vulnerabilities and lower search visibility. Publications that collect leads through embedded forms or process payments through integrated checkout flows are especially exposed without SSL, as every piece of data travels in cleartext.

All FlipLink publications are served over HTTPS with SSL/TLS encryption enabled by default — there is nothing to configure. Every flipbook, document viewer link, and embedded publication is automatically secured from the moment it goes live. When you connect a [custom domain](/features/custom-domains) to your FlipLink publications, FlipLink provisions and manages an SSL certificate for that domain automatically, including renewals. This means your branded URLs (e.g., catalog.yourbrand.com) display the same padlock icon and encrypted connection as any major website. Data submitted through [lead capture forms](/features/lead-capture), password-protected access, and [Stripe payment flows](/features/sell-documents) are all transmitted through this encrypted channel.