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The Importance of SSL Certificates: Beyond Security to Trust

The security of web communication has become paramount. The shift towards implementing HTTPS has been accelerated by changes in search engine algorithms, but it's important to understand that security and trust in web communication are not synonymous. With over 30 years in the field, let us guide you through the nuances of SSL certificates and why they matter.

How Website Security Works

To appreciate the significance of SSL (Secure Sockets Layer) certificates, it's essential to grasp how they work at a fundamental level. 

When you visit a secure website (one with "https://" in the URL), your web browser and the web server engage in a cryptographic handshake. This handshake involves the server presenting its SSL certificate to the browser. The certificate contains a public key, which is part of a key pair unique to that server.

Here's where the magic happens: your browser, upon receiving the certificate, validates it with a trusted Certificate Authority (CA). Once validated, your browser generates a session key, which it encrypts using the server's public key from the certificate. This session key is then sent back to the server, securely establishing a shared secret between your browser and the web server. From this point onwards, all data exchanged between your browser and the server is encrypted using this shared secret key, ensuring that even if intercepted, it remains indecipherable to prying eyes.

In this way, SSL certificates play a pivotal role in facilitating secure, encrypted communication between web browsers and servers, forming the foundation of online security.

Understanding the Difference between Security and Trust

So, security in web communication refers to the encryption and protection of data exchanged between a user's browser and a website and SSL  certificates ensure that this data remains confidential and tamper-proof during transit. However, trust goes beyond mere encryption. It involves verifying the identity and credibility of the website owner. Trust assures users that they are interacting with a legitimate entity and not a malicious impostor.

Search Engines and SSL Security

Currently, search engines primarily focus on the security aspect of SSL certificates. They prioritise websites with HTTPS over HTTP to ensure that users' data remains secure during online interactions. While this is a crucial step, it's just the beginning of creating trust in online communication.

Three Types of Security Verification for SSL Certificates

Anyone can apply for an SSL certificate for any domain. To stop malicious actors obtaining certificates for domains they aren't entitled to, the issuing authorities verify the request using one of three types of verification:

  1. Domain Validated (DV): These certificates only verify that the domain is controlled by the certificate applicant. DV certs are quick to obtain and cost-effective but offer the lowest level of trust as they don't verify the entity behind the website.
  2. Organisation Validated (OV): OV certificates provide a higher level of trust. They verify the domain ownership and also conduct background checks on the organisation. 
  3. Extended Validation (EV): EV certificates offer the highest level of trust. They include rigorous validation processes to confirm the legal existence and identity of the organisation

The Role of DV Certificates

DV certificates are useful for testing and when cost is a major concern. However, their limited trust level makes them unsuitable for websites that require user confidence.

Importance of OV Certificates for Brochure Websites

Even a brochure website for a business should use an OV certificate. This helps establish the legitimacy of the business and instils trust in visitors, which can lead to higher engagement and conversions.

EV Certificates for E-commerce and Data-Intensive Websites

E-commerce sites and those collecting significant personal data should invest in EV certificates. These certificates not only ensure security but also showcase the highest level of trust, which is crucial for sensitive transactions and data handling.

The Impact of Free DV Certificates

The availability of free DV certificates has driven down the cost of SSL certificates across the board. While this is beneficial for website owners, it's important not to compromise trust for the sake of cost savings.

The Future: Trust in Web Communication

In the ever-evolving digital landscape, website owners should consider not only the security but also the trustworthiness of their online presence. It's likely that search engines and AI systems will soon factor trust into their ranking algorithms. As such, website owners should be prepared to invest in SSL certificates that align with the function and credibility of their websites.


In conclusion, while security is a vital aspect of web communication, trust is equally significant. Website owners should carefully assess their SSL certificate needs and invest in the appropriate level of validation to build trust with their audience. As the digital world continues to evolve, trust will become a defining factor in online success.