Secure Sockets Layer (SSL).

Secure Sockets Layer (SSL) is a security protocol that encrypts the connection between a Web browser and a Web server. It ensures that sensitive data such as passwords, payment information and personal data cannot be intercepted or read by third parties in transit. For SME entrepreneurs, SSL is crucial because it creates trust with visitors and is required for modern websites, ecommerce stores and systems that process privacy-sensitive information.

How does SSL encryption work in practice?

SSL works through a process called a handshake. When a visitor visits your Web site, the browser checks for a valid SSL certificate. This certificate contains a public key that the browser uses to establish a secure connection. Then, all data passing back and forth between browser and server is encrypted with a unique session key. This happens automatically and is visible to the visitor only by the lock in the address bar and the HTTPS prefix in the URL. The encryption makes it virtually impossible for malicious parties to read along, even if they have access to the network over which the data is sent.

From SSL to TLS: what you need to know about the successor

Although the term SSL is still widely used, the protocol itself has been replaced by Transport Layer Security(TLS) for years. SSL version 3.0 was officially labeled insecure by security organizations in 2015. TLS is the modern successor and offers stronger encryption and better protection against attacks. Still, the term SSL remains in use because it is recognizable and because certificates are often still called SSL certificates. In practice, every modern website with a valid certificate runs on TLS 1.2 or 1.3. For you as a business owner, this makes little difference: as long as your hosting or managed WordPress hosting offers a current certificate, you are well protected.

What SSL brings to your website and ecommerce store

An SSL certificate is no longer a nice-to-have, but a basic requirement. Google has been marking websites without HTTPS as unsafe in Chrome since 2018, which immediately deters visitors. In addition, Google uses HTTPS as a ranking factor within search engine optimization (SEO). For ecommerce stores, SSL is mandatory according to the General Data Protection Regulation (AVG) and required by payment providers such as Mollie and Stripe. Without a valid certificate, you simply cannot process payments. In addition, the padlock in the address bar increases visitor confidence, which directly affects your conversion rate. In our projects we see that ecommerce stores without HTTPS have on average 20 to 30 percent lower conversion rates, simply because visitors hesitate at the checkout.

SSL certificates are deployed wherever data is exchanged between visitor and server. The application varies depending on the type of website and the sensitivity of the data being processed. Below are the main scenarios in which an SSL certificate makes a difference for SMEs.

Securing ecommerce stores and payment processes

An SSL certificate is required by law for every ecommerce store as soon as you process personal data or payment data. Payment providers such as Mollie, Stripe and Adyen require a secure connection before allowing transactions. Without HTTPS, you simply cannot receive payments. In addition, the AVG requires you to protect personal data such as name, address and e-mail address during transport. An ecommerce store without SSL is marked as unsafe by browsers, which directly leads to abandoned shopping carts. In practice, we see that ecommerce stores with a valid certificate achieve up to 35 percent higher conversion than comparable stores without HTTPS. A professional ecommerce store therefore always starts with a current SSL certificate as its foundation.

Protect contact forms and lead generation

Even websites without ecommerce stores benefit from SSL once they offer a contact form, registration form or download page. Every form in which visitors enter their name, e-mail address, phone number or company data falls under the AVG. Without encryption, this data can be intercepted, making you liable as a business owner. Browsers such as Chrome and Firefox display a warning as soon as a visitor starts typing into a form on an unsecured page. That deters and damages your credibility. For B2B service providers who depend on leads through the website, SSL is therefore just as important as it is for ecommerce stores. It costs little, but prevents trust damage and legal risks.

Shielding login portals and customer environments

Websites with a login environment, customer portal or member page always need an SSL certificate. Once users log in with a password, sensitive data is sent. Without encryption, an attacker on the same network can intercept and misuse these login credentials. This also applies to WordPress websites where you login yourself to /wp-admin. Without HTTPS, your username and password are sent in plain text. Hosting parties such as those offering managed WordPress hosting nowadays provide an SSL certificate by default through Let's Encrypt. That certificate renews automatically and costs you nothing extra. Still, we regularly see old websites or self-built portals still running without HTTPS, posing an unnecessary security risk.

When SSL is the right choice and when it is not

SSL is mandatory as soon as you process personal data, run an ecommerce store or offer a login environment. It is also necessary if you want to rank well in Google, as HTTPS is an official ranking factor. Almost every modern hosting party offers a free Let's Encrypt certificate, so there is little reason not to use it. Still, there are situations where SSL is less urgent: a completely static website with no forms, no login and no tracking doesn't technically need to have HTTPS. But even then, we recommend it because browsers like Chrome mark every HTTP page as insecure. The only exception is internal test environments or local development servers that are not publicly accessible. For all other scenarios, SSL is the default.