I have read some textbooks and not found a convincing explanation.
In the cipher suite ECDHE-RSA-AES128-GCM-SHA256, what is the role of RSA in the first part (ECDHE-RSA)? This part of the cipher suite indicates the key exchange algorithm, right? That is what ECDHE is used for: key exchange, so why do we need RSA?
Are both algorithms used to exchange the keys? I’m a bit confused about that.
Obviously, it is not necessary to explain ECDHE or RSA separately. I just want an explanation of how they work in this context.