This e-book explains OAuth2.0 and OpenID Connect, focusing on their application in modern web development. It covers best practices and the reasons behind using these frameworks for authentication and authorization.

opkssh is a tool that allows SSH access through OpenID Connect, enabling users to log in using their email identities instead of long-lived SSH keys. It generates SSH public keys with PK Tokens and integrates with various OpenID Providers, simplifying authentication for SSH users. Installation is straightforward via package managers or manual downloads, and the tool supports a range of operating systems including Linux, macOS, and Windows.