IT Säkerhet Hur funkar Certifikat HTTPS

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It is important to understand how IT security works and what role certificates play in this process. One of the most common protocols used for secure communication over the internet is HTTPS, which stands for HyperText Transfer Protocol Secure. This protocol uses a combination of encryption and digital certificates to ensure that data transmitted between a web browser and a server remains private and secure.

The main idea behind HTTPS is to provide an encrypted connection between the user’s browser and the website they are visiting. This means that any data exchanged between them cannot be intercepted or read by third parties, which helps protect sensitive information such as passwords, credit card numbers, and personal details from being stolen or misused.

To establish a secure connection using HTTPS, a digital certificate is required. A digital certificate is an electronic document that contains information about the identity of the website owner and their public key. This certificate is issued by a Certificate Authority (CA), which verifies the identity of the website owner through various means such as checking their physical address or other forms of identification.

Once the certificate is obtained, it is installed on the server hosting the website. When a user visits the site, their browser sends a request to the server and receives a response that includes the digital certificate. The browser then checks the validity of the certificate by verifying its expiration date, the identity of the website owner, and whether the certificate has been revoked or not.

If everything is in order, the browser establishes an encrypted connection with the server using the public key contained in the certificate. This ensures that any data exchanged between the user’s browser and the server remains private and secure.

In summary, HTTPS uses a combination of encryption and digital certificates to provide a secure communication channel over the internet. The role of certificates is crucial as they help establish trust between the user’s browser and the website they are visiting by verifying the identity of the website owner and ensuring that the connection is encrypted and secure.

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