A deep-dive into 'what is authentication' as well as a look into some common forms of authentication.
A deep-dive into authorization including what it is, common authz patterns, security concerns and best practices.
A popular coarse grained authorization scheme driven off of roles, permissions and users that is commonly used in B2B applications and SaaS.
A fine grained form of access control that allows for the definition of access policies based on arbitrary user, subject, environment and object attributes.
A form of fine grained access control where access is determined based on relationships between users/subjects and objects.
A deeper look into multitenancy architecture and how it compares/contrasts with single-tenant applications.