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Learn how basic access authentication works in HTTP transactions, where a user agent provides a user name and password in a header field. Find out the features, security, and protocol of this method, and its alternatives and references.
HTTP 403 is an HTTP status code meaning access to the requested resource is forbidden. Learn the causes, examples, and substatus error codes for IIS of this common ...
Learn about the meaning and usage of HTTP response status codes, which indicate the server's response to a client's request. Find out the five classes of codes, their codes, phrases, and examples.
Learn about the process of establishing confidence in user identities electronically presented to an information system. Explore various e-authentication methods, such as tokens, passwords, biometrics, and digital credentials.
WebAuthn is a W3C standard that allows users to authenticate to web applications and services using FIDO2 authenticators, which can be software or hardware devices. WebAuthn provides security, convenience, and interoperability benefits over traditional password-based authentication.
CAS is a single sign-on protocol for the web that allows users to access multiple applications with one set of credentials. Learn about its history, features, implementations and related terms.
Multi-factor authentication (MFA; two-factor authentication, or 2FA, along with similar terms) is an electronic authentication method in which a user is granted access to a website or application only after successfully presenting two or more pieces of evidence (or factors) to an authentication mechanism.
RADIUS is a protocol that provides centralized AAA management for users who connect and use a network service. It uses Access-Request and Accounting-Request messages to authenticate, authorize and account for network access, and can communicate with external sources such as LDAP or Active Directory.