Set up SSL encryption

What is SSL/TLS?

SSL stands for Secure Sockets Layer, an encryption protocolwhich was introduced in 1995. It was developed to enable secure Internet communication and is used to encrypt data during its transmission between Browser and web servers. Even if nowadays the term TLS (Transport Layer Security), SSL is often still used as a synonym.

The Main objective of SSL/TLS is to protect sensitive data such as emails or login information from unauthorized access. This is done by encrypting the data in a secure channel between the client and server. In addition, a SSL/TLS certificate The identity of a website is secured by verifying the authenticity of the communication partner and ensuring a trustworthy connection. This not only ensures data integrity, but also creates trust among users.

How SSL encryption works

The SSL encryption operates through an automatic exchange of a so-called Session key between Browser and server. This key is used to secure data traffic on both sides during a session. This means that information sent between the user and the web server is protected against unauthorized interception.

Encryption methods

SSL relies on a combination of more symmetrical and asymmetric encryption. In symmetric encryption, a single key is used to encrypt and decrypt data. This is efficient and fast, but the key must be transmitted securely between the sender and recipient. Asymmetric encryption solves this problem by using two linked keys: a private key and a public key. The public key encrypts the data, which can then only be decrypted by the corresponding private key.

At SSL process the connection setup starts with a Handshakein which the server and client agree on the encryption methods and session keys. After the handshake, the data traffic is encrypted via a secure line using the agreed session key. This makes it possible for only authorized parties to read the information, which ensures a high level of security and data protection.

Advantages of using SSL

The Use of SSL offers numerous advantages, especially in terms of security and trust on the Internet. One major advantage is the strengthening of the User confidence. If a website is secured by SSL, the "s" in "HTTPS" and the lock symbol in the address bar signal to visitors that their data is being transmitted securely. This is particularly important for websites that request sensitive information, such as online stores or banking sites.

Legal and search engine advantages

Another important aspect of SSL is compliance with legal requirements. Safety standardsincluding the General Data Protection Regulation (GDPR) in the European Union. Organizations that process the personal data of their users are required by law to take appropriate measures to protect it. SSL helps to meet these requirements and avoid legal consequences.

SSL also influences the Visibility positively in search engines. Sites with HTTPS connections can benefit from a better position in search engine rankings, as search engines such as Google prefer secure websites. These improvements lead to higher Traffic and potentially more customers. Therefore, implementing SSL is not only a security measure, but also a strategic decision that can have a positive impact on long-term business results.

SSL certificates and their importance

SSL certificates are a central component of secure Internet communication, as they guarantee the Authenticity and identity of websites. These certificates are issued by third parties, so-called certificate authorities. They ensure that the website visited is genuine and has not been manipulated by fraudsters, which makes phishing attacks much more difficult.

Types and use of SSL certificates

There are different types of SSL certificates that meet different security requirements. Domain Validation (DV) certificates offer basic encryption and are relatively easy to obtain, as they only check the ownership of a domain. Organization Validation (OV) Certificates offer additional security levels by confirming the existence and identity of the organization behind the domain. Ensuring maximum security Extended Validation (EV) certificateswhich include an extensive check of the company and usually lead to the company name being displayed in the address bar.

There are also Wildcard certificatesthat secure multiple subdomains under one main domain. They are a cost-effective solution for websites that use numerous subdomains with a constantly growing network. Regardless of the type, a SSL certificate must be regularly renewed and correctly installed to ensure the protection and functionality of the secure connection in the long term.

Setup and management of SSL certificates

Setting up and managing SSL certificates is an essential step in ensuring the security of web connections. The process usually begins with the purchase of an SSL certificate via a web host or directly from a certification authority. Once purchased, the certificate must be installed on the web server to enable HTTPS connections.

Steps for setting up HTTPS

Switching from an HTTP to an HTTPS connection involves several steps. First, the purchased certificate is installed on the server. Then a Detour from HTTP to HTTPS to ensure that all links and bookmarks are updated correctly and users automatically access the secure version of the website. A critical point here is the avoidance of Mixed ContentThis means that it must be ensured that all resources embedded on the website are also loaded via HTTPS in order to avoid security warnings.

For the Administration regular checks and renewals of the certificate are necessary to guarantee its validity and the continuous security of the connection. Self-signed certificates can be used for internal applications, but are not recommended for publicly accessible websites, as they can be classified as insecure by browsers. Finally, SEO measures should be taken into account and relevant integrated services such as Google Analytics to ensure that they are compatible with the HTTPS changeover.