The Secure Remote Password (SRP) protocol tries to protect the password from being sent insecurely over the network, through alternate means like clients letting the server know that they have the correct password, without actually sending it over the network.

SRP is currently only supported in client-side SDKs for iOS, Android, and JavaScript. Backend SDKs, such as the ones for Java, Node.js, Ruby, and others, do not support SRP. Server-side authentication flows usually happen on secure backend servers; hence, SRP protocol calculations may not be required.