| perl540Packages.PlackMiddlewareAuthDigest | Digest authentication |
| perl540Packages.NetSMTPTLS | SMTP client supporting TLS and AUTH |
| perl540Packages.NetSMTPTLSButMaintained | SMTP client supporting TLS and AUTH (DEPRECATED, use Net::SMTPS instead) |
| perl540Packages.ApacheAuthCookie | Perl Authentication and Authorization via cookies |
| perl540Packages.ModuleInstallAuthorTests | Designate tests only run by module authors |
| perl540Packages.ModuleInstallAuthorRequires | Declare author-only dependencies |
| perl540Packages.MailAuthenticationResults | Object Oriented Authentication-Results Headers |
| perl540Packages.AuthenSASL | SASL Authentication framework |
| perl540Packages.AuthenSCRAM | Salted Challenge Response Authentication Mechanism (RFC 5802) |
| perl540Packages.AuthenSimple | Simple Authentication |
| perl540Packages.AuthenSimplePasswd | Simple Passwd authentication |
| perl540Packages.HTTPServerSimpleAuthen | Authentication plugin for HTTP::Server::Simple |
| perl540Packages.CatalystPluginAuthorizationRoles | Role based authorization for Catalyst based on Catalyst::Plugin::Authentication |
| perl540Packages.CatalystAuthenticationStoreHtpasswd | Authen::Htpasswd based user storage/authentication |
| perl540Packages.CatalystAuthenticationStoreLDAP | Authenticate Users against LDAP Directories |
| perl540Packages.AuthenKrb5 | XS bindings for Kerberos 5 |
| perl540Packages.AuthenOATH | OATH One Time Passwords |
| perl540Packages.AuthenDecHpwd | DEC VMS password hashing |
| perl540Packages.LWPAuthenOAuth | Generate signed OAuth requests |
| perl540Packages.AuthenModAuthPubTkt | Generate Tickets (Signed HTTP Cookies) for mod_auth_pubtkt protected websites |
| perl540Packages.AuthenKrb5Admin | Perl extension for MIT Kerberos 5 admin interface |
| perl540Packages.AuthenRadius | Provide simple Radius client facilities |
| perl540Packages.AuthenSASLSASLprep | Stringprep Profile for User Names and Passwords (RFC 4013) |
| perl540Packages.AuthenHtpasswd | Interface to read and modify Apache .htpasswd files |
| perl540Packages.AuthenPassphrase | Hashed passwords/passphrases as objects |
| perl540Packages.HTMLMason | High-performance, dynamic web site authoring system |
| perl540Packages.CatalystPluginAuthorizationACL | ACL support for Catalyst applications |
| perl540Packages.POETestLoops | Reusable tests for POE::Loop authors |
| perl540Packages.CPANCommonIndex | Common library for searching CPAN modules, authors and distributions |
| perl540Packages.CatalystPluginAuthentication | Infrastructure plugin for the Catalyst authentication framework |
| perl540Packages.CatalystAuthenticationCredentialHTTP | HTTP Basic and Digest authentication for Catalyst |
| perl540Packages.CatalystAuthenticationStoreDBIxClass | Extensible and flexible object <-> relational mapper |
| perl540Packages.TestDistManifest | Author test that validates a package MANIFEST |
| perl540Packages.DistZillaPluginMojibakeTests | Author tests for source encoding |
| perl540Packages.DistZillaPluginTestDistManifest | Author test that validates a package MANIFEST |
| perl540Packages.DistZillaPluginTestPortability | Author tests for portability |
| perl540Packages.NTLM | NTLM authentication module |
| perl540Packages.DigestHMAC | Keyed-Hashing for Message Authentication |