Loading...Regarding online security, especially when transmitting personal or financial information, two key protocols come into play: SSL and TLS.
They are responsible for ensuring that your data does not fall into the hands of intruders while traveling online.
What are SSL and TLS in simple terms
Both protocols are encryption systems that protect data transmitted between two parties, such as between your browser and a website. But there are important differences between them.
SSL (Secure Sockets Layer) is an older technology used when web security was originally built. Today, it is considered obsolete and is no longer used.
TLS (Transport Layer Security) is a more modern and secure development of SSL. It is TLS that is now used by all major websites and online services. Any website that starts with https:// uses TLS, although many people still say “SSL” because it’s the more familiar term.
The history of SSL & TLS
- SSL 1.0 was never released – it had serious vulnerabilities.
- SSL 2.0 appeared in 1995 but quickly became obsolete.
- SSL 3.0 was released in 1996 and became more reliable, but it was soon replaced.
- TLS 1.0 became the official successor to SSL in 1999.
- TLS 1.1 and 1.2 gradually strengthened security and eliminated old vulnerabilities.
- TLS 1.3 (released in 2018) is the current standard, providing both high security and faster operation.
Key differences between TLS and SSL
| Characteristic | SSL | TLS |
| Status | Outdated | Modern standard |
| Encryption | Uses weaker algorithms | Uses strong, reliable algorithms |
| Performance | Slower | Faster connection establishment |
| Message authentication | Based on MD5 | Uses HMAC (more secure) |
| Browsers support | Almost absent | Supported by all |
What about SSL certificates?
The name “SSL certificate” has stuck, but all modern certificates use TLS. That is, when you buy an SSL certificate today, you get protection via TLS – they just haven’t changed the term due to habit and marketing.
Conclusion
While SSL was the first step towards a secure internet, its era is long gone. Today, online communications are secured by TLS, a protocol that is fast, reliable, and secure against modern threats. If you are creating a website, working with sensitive data, or simply want to protect your users, you need TLS. Fortunately, it is already built into every modern SSL certificate.
