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