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As long as you trust the root certificate, you can trust the certificate of the website you’re communicating with. This can go on until you reach a root certificate. The Certificate Authorities are also signed for the same reason. The signature tells you that the certificates are real. SSL certificates are signed by a Certificate Authority. So, while you’re sure that communication is secure, how do you know you’re talking to the correct server? However, the initial connection is done in clear text since it comes before encrypted communication is set up. The encrypted communication makes sure that what you send to the server and vice versa isn’t altered. We’ll not go into details on how the encryption or the SSL handshake works. This is a simple and incomplete description of the whole process. This certificate contains numbers that machine 1 will use to encrypt their communication. How does SSL work? Machine 1 initiates the connection and looks at the SSL certificate of machine 2. In the cases above, between the machines of your app and the 3rd-party API or between your machine and the machine. Secure Sockets Layer or SSL is the security protocol that provides secure communication between two machines. In short, you should always use HTTPS, which is secured using an SSL certificate. If you request a gem from from your laptop, and say you’re using public WiFi, the WiFi provider can give you a modified gem. If you don’t use the HTTPS version and use the non-secure HTTP version, the data you receive can be altered by anyone on the path from the user to your server. When your app connects to a 3rd-party API or when the gem command connects to, you need to use the HTTPS version e.g. First, let’s discuss why you need to use SSL.
This error, as you can see on the message, has something to do with SSL and certificates. This post explains what the error is and provides some possible solutions. SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed When working on your Rails app or when installing gems, you might get this Ruby SSL error :
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