| liboqs | | Post quantum crypto library |
| libp11 | | Convenience library for easy PKCS#11 implementation |
| libpbc | | Pair-based cryptographic library based on Gap Diffie Helman groups |
| libpe | | The PE library used by pev - the PE file toolkit |
| libpwquality | | Library for generating random passwords and quality checking |
| libressl | | Secure Sockets Layer and cryptography libraries and tools |
| libretls | | Port of libtls for OpenSSL |
| libsecp256k1 | | Optimized C library for EC operations on curve secp256k1 |
| libsecret | | GObject based library for accessing the Secret Service API |
| libsodium | | Library for build higher-level cryptographic tools |
| libssh | | SSHv2+v1 protocol library |
| libssh2 | | SSH2 protocol library |
| libstark | | Library for succinct non-interactive zero knowledge proofs |
| libtasn1 | | ASN.1 structure parser library |
| libtcpa | | TCPA libraries and test programs from IBM |
| libtomcrypt | | Tom St Denis's cryptographic library |
| libuecc | | Very small Elliptic Curve Cryptography library |
| libykneomgr | | Yubikey NEO C library and command-line tool |
| libyubikey | | Yubikey library |
| log2timeline | | Framework for automatic creation of a super timeline |
| logcheck | | Auditing tool for system logs on Unix boxes |
| lsh | | SSH2 client/server |
| lua-arc4random | | Lua wrapper for arc4random(3) |
| lua-argon2 | | Lua C binding for the Argon2 password hashing algorithm |
| lua-bcrypt | | Lua wrapper for the bcrypt password hashing function |
| lua-cyrussasl | | Cyrus SASL library for Lua 5.1+ |
| lua-ossl | | Comprehensive OpenSSL module for Lua |
| lua-sec | | Lua binding for OpenSSL library |
| lxqt-openssh-askpass | | Tool used with openssh to prompt the user for a password |
| lxqt-policykit | | Policykit authentication agent |
| lxqt-sudo | | LXQt GUI frontend for sudo |
| lynis | | Perform security health scans |
| mate-polkit | | MATE desktop environment Authentication Agent for PolicyKit |
| mbedtls | | Lightweight, modular cryptographic and SSL/TLS library (2.x branch) |
| mbedtls3 | | Lightweight, modular cryptographic and SSL/TLS library (3.x branch) |
| mcrypt | | Replacement to crypt(1), supports many crypto algorithms |
| md4-collision | | MD4 Collision generator |
| md5-collision | | MD5 Collision generator |
| mdigest | | Calculates a message digest |
| merkletree | | Library and utility to calculate merkle trees |
| metasploit (V) | | Exploit-Framework for Penetration-Testing |
| mhash | | Hash algorithms library |
| minisign | | Dead simple tool to sign files and verify signatures |
| mirrordir | | Directory mirroring tool |
| mit-krb5 | | MIT Kerberos 5 authentication system |
| mit-krb5-appl | | MIT Kerberos 5 authentication system applications |
| mixmaster (V) | | The Mixmaster anonymous remailer client |
| monocypher | | Easy to use, deploy and auditable crypto library |
| mozilla-rootcerts | | Root CA certificates from the Mozilla Project |
| mozilla-rootcerts-openssl | | Wedge for installing and managing mozilla-rootcerts |
| msu | | Mini passwordless su |
| msudir | | Easy setuid script management |
| multigest | | Library and utility to calculate multiple message digests |
| munge | | Authentication service for creating and validating credentials |
| nacl | | Secure, usable, fast networking and cryptography library |
| netpgp | | PGP signing, verification, encryption and decryption program |
| netpgpverify | | Standalone PGP and ssh signature verification utility |
| nettle | | Cryptographic library |
| netwib (V) | | Network library providing network functionality for developers |
| netwox (V) | | Toolbox that helps to find and solve network problems |
| nfsbug | | NFS security verification suite |
| nikto | | URL scanner used to search for known vulnerable CGIs on websites |
| nuclei | | Fast and customizable vulnerability scanner |
| oath-toolkit | | OATH (Open AuTHentication) Toolkit |
| oauth2c | | User-friendly CLI for OAuth2 |
| ocaml-cryptokit | | Cryptographic primitives library for Objective Caml |
| ocaml-safepass | | Safe storage library for user passwords in web applications |
| ocaml-ssl | | SSL library for OCaml |
| ocserv (V) | | SSL VPN server |
| olm | | Implementation of the Double Ratchet cryptographic ratchet |
| opencdk | | Open Crypto Development Kit |
| openct | | Smart Card Reader drivers and middleware |
| opendnssec | | OSS for a fast and easy DNSSEC deployment |
| opendnssec2 | | OSS for a fast and easy DNSSEC deployment |
| opendoas | | Execute commands as another user |
| openpam | | Open-source PAM library |
| opensaml | | Security Assertion Markup Language (SAML) |
| opensc | | Smart Card drivers and middleware |
| openssh | | Open Source Secure shell client and server (remote login program) |
| openssl | | Secure Socket Layer and cryptographic library |
| oqs-provider | | Open Quantum Safe provider for OpenSSL |
| oqtplayer (V) | | Small OpenQuickTime (TM) player, using SDL |
| osv-scanner | | Vulnerability scanner written using the OSV project |
| otpCalc | | OTP and S/Key calculator for X |
| p0f | | Passive OS fingerprinting tool |
| p11-kit | | PKCS#11 module manager |
| p5-Apache2-AuthCASSimple (V) | | Apache2 module to authenticate through a CAS server |
| p5-AuthCAS | | AuthCAS - Client library for CAS 2.0 authentication server |
| p5-Authen-CAS-Client | | Perl 5 module providing an interface for JA-SIG's CAS |
| p5-Authen-Htpasswd | | Interface to read and modify Apache .htpasswd files |
| p5-Authen-PAM | | Authentication via PAM |
| p5-Authen-PluggableCaptcha | | Perl5 module implementing a pluggable Captcha framework |
| p5-Authen-SASL | | Perl module to handle SASL authentication |
| p5-Authen-SASL-Authd | | Perl module to handle SASL auth via Cyrus saslauthd or Dovecot |
| p5-Authen-SASL-Cyrus | | Perl module to handle Cyrus protocol for SASL authentication |
| p5-Authen-Simple | | Simple and consistent framework for authentication |
| p5-Authen-TacacsPlus | | Perl extension for authentication using tacacs+ server |
| p5-BSD-arc4random | | Perl interface to the arc4 random number generator |
| p5-Bytes-Random-Secure | | Perl extension to generate cryptographically-secure random bytes |
| p5-Bytes-Random-Secure-Tiny | | Perl extension to generate cryptographically-secure random bytes |