Spring Security 5 provides a number of new features along with support for Spring 5. Some of the important new features introduced as part of this release are:

• Support for OAuth 2.0 and OpenID Connect (OIDC) 1.0: Allows users to log in to your application using their existing OAuth provider (for example, GitHub) or OIDC provider (for example, Google). OAuth is implemented using Authorization Code Flow. We will delve deep into this in subsequent chapters.
• Reactive support: Spring 5 introduced a new reactive web application framework—Spring WebFlux. Spring Security made sure that this web application framework is fully supported in all aspects (authentication and authorization) using reactive concepts.
• Improved password encoding: The introduction of the password-encoding delegation allows usage of more than one algorithm for encoding various passwords. The way Spring identifies the algorithm is by reading the prefix of the encoded password, which contains the algorithm used to encode the password. The format is {algorithm}encoded_password.