What is Secure Sockets Layer?

Secure Sockets Layer (SSL) is a security protocol that creates an encrypted connection between a server and a client, such as a web server and a browser. This connection is established through a process known as an SSL handshake, which authenticates the two communicating parties and encrypts all data passed between them. In network management and telecom, this protocol is crucial for securing data in transit, safeguarding everything from customer credentials to proprietary company information across the network.

History of SSL

The protocol's history helps clarify the original SSL meaning. Developed by Netscape in the mid-1990s, early versions had security flaws, leading to the release of the more robust SSL 3.0 in 1996. This evolution paved the way for its successor, Transport Layer Security (TLS), which is the standard used today.

How SSL Works

The process begins with an SSL handshake, where the client and server agree on encryption protocols.

• Handshake: The client requests a secure connection from the server.
• Authentication: The server presents its SSL certificate to prove its identity.
• Encryption: Both parties generate session keys to encrypt all subsequent data.

Secure Sockets Layer vs. Transport Layer Security

Although they are often mentioned together, Transport Layer Security (TLS) is the direct and more secure successor to Secure Sockets Layer.

• Legacy: The original Secure Sockets Layer protocol has known security vulnerabilities and is now considered obsolete. While foundational, its use is discouraged for modern enterprise networks and is typically only found supporting older, un-updated systems.
• Modern: TLS provides more robust encryption and authentication methods, making it the current security standard. For mid-market and enterprise companies, implementing TLS is critical for protecting data and meeting compliance requirements for network traffic.

Benefits of Using SSL

The benefits explain what is secure sockets layer in practice. It provides robust data encryption, protecting information in transit from being intercepted. It also authenticates the server's identity, which prevents man-in-the-middle attacks and helps meet compliance standards for network traffic.

Common SSL Certificates

Understanding what is an SSL certificate involves knowing the different types available, each offering varying levels of validation for your network's security needs.

• Domain Validated (DV): Confirms domain ownership and provides basic encryption, suitable for sites without sensitive data transactions.
• Organization Validated (OV): Authenticates the business identity behind the domain, offering a higher level of trust for users.
• Extended Validation (EV): Involves a strict vetting process of the organization, providing the highest level of assurance.
• Wildcard: Secures a primary domain and an unlimited number of its subdomains under a single certificate.
• Multi-Domain (SAN): Protects multiple distinct domain names with one certificate, offering flexibility for complex web properties.

Frequently Asked Questions about Secure Sockets Layer

What does SSL stand for and is it still used?

SSL stands for Secure Sockets Layer. While the original protocol is obsolete, what is secure sockets layer is a concept that lives on through its successor, TLS (Transport Layer Security), which is used for modern data encryption.

So, what is SSL if it's obsolete?

It's the foundational technology for modern web security. While obsolete, knowing what is secure sockets layer is key to understanding the evolution of TLS, the protocol that actually secures your network connections today against modern threats.

What is Secure Sockets Layer SSL's role in network compliance?

Properly implementing encryption via TLS is often a requirement for compliance standards like PCI DSS and HIPAA. This is what is secure sockets layer in a regulatory sense—demonstrating due diligence in protecting sensitive data as it moves across the network.

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