| gnu-pw-mgr | | Password manager |
| GNUMail-pgp (V) | | Bundle for PGP support in GNUMail |
| gnupg | | GNU Privacy Guard, public-Key encryption and digital signatures |
| gnupg-pkcs11-scd | | OpenSC smart card support for GnuPG |
| gnupg2 | | GnuPG with OpenPGP and S/MIME capabilities |
| gnutls | | Transport Layer Security library |
| gnutls-guile (V) | | Guile bindings for the GnuTLS library |
| go-asn1-ber | | ASN1 BER Encoding/Decoding Library for the GO programming language |
| go-getpass | | a Go module to get a password |
| go-mkcert | | Make locally trusted development certificates |
| gobuster | | Service explorer |
| google-authenticator | | One-time password generator and PAM module from Google |
| gopass | | Rewrite of the pass password manager in Go |
| gpa | | GUI frontend to gnupg |
| gpg-tui | | Manage your GnuPG keys with ease |
| gpg2dot | | Converts your GnuPG keyring to a graph of associations |
| gpgme | | GnuPG Made Easy |
| gpgmepp | | C++ bindings/wrapper for gpgme |
| gsasl | | GNU implementation of the Simple Authentication and Security Layer |
| gss | | GNU Generic Security Service Library |
| hackbot | | Vulnerability scanner written in Perl |
| hashcash | | Hash collision based postage stamp |
| hashcat | | World's fastest and most advanced password recovery utility |
| heimdal | | Kerberos 5 implementation |
| heirloom-su | | Collection of standard Unix utilities (su) |
| HElib | | Homeomorphic Encryption library |
| hercules4sdl-crypto | | The SoftDevLabs version of crypto for Hercules 4.x |
| hitch | | High performance SSL/TLS proxy |
| honeyd | | Small daemon that creates virtual hosts on a network |
| honeyd-arpd | | ARP daemon for honeyd |
| hs-blake2 | | Library providing BLAKE2 |
| hs-crypto-api | | Generic interface for cryptographic operations |
| hs-crypto-token | | Crypto tokens |
| hs-cryptohash-md5 | | Fast, pure and practical MD5 implementation |
| hs-cryptohash-sha1 | | Fast, pure and practical SHA-1 implementation |
| hs-cryptohash-sha256 | | Fast, pure and practical SHA-256 implementation |
| hs-crypton | | Cryptography Primitives sink |
| hs-crypton-conduit | | Crypton conduit |
| hs-crypton-x509 | | X509 reader and writer |
| hs-crypton-x509-store | | X.509 collection accessing and storing methods |
| hs-crypton-x509-system | | Handle per-operating-system X.509 accessors and storage |
| hs-crypton-x509-validation | | X.509 Certificate and CRL validation |
| hs-digest | | Various cryptographic hashes for bytestrings; CRC32 and Adler32 |
| hs-ed25519 | | Ed25519 cryptographic signatures |
| hs-entropy | | Platform independent entropy source |
| hs-hackage-security | | Hackage security library |
| hs-pem | | Privacy Enhanced Mail (PEM) format reader and writer |
| hs-securemem | | Abstraction to an auto scrubbing and const time eq, memory chunk |
| hs-SHA | | Implementations of the SHA suite of message digest functions |
| hs-skein | | Skein, a family of cryptographic hash functions |
| hs-tls | | TLS/SSL protocol native implementation (Server and Client) |
| hs-tls-session-manager | | In-memory TLS session DB and session ticket |
| httpx | | HTTP toolkit that allows running multiple probes |
| hydan | | Steganography tool for covert comms, signing and watermarking |
| hydra | | Login password cracker |
| ike-scan | | Fingerprinting IKE implementation |
| ipv6-toolkit | | IPv6 security assessment and troubleshooting tool |
| john | | Unix Password Cracker |
| kauth | | Abstraction to system policy and authentication features |
| kdesu | | Integration with su for elevated privileges |
| KeePass | | Free, open source, light-weight and easy-to-use password manager |
| keepassxc | | Password generator and manager |
| keychain | | Nice ssh-agent front-end |
| kf6-kauth | | Abstraction to system policy and authentication features |
| kf6-kdesu | | Integration with su for elevated privileges |
| kf6-kwallet | | Secure and unified container for user passwords |
| kgpg | | KDE encryption tool |
| kleopatra | | Certificate Manager and Unified Crypto GUI |
| knc | | Kerberised NetCat |
| kpcli | | Command line interface to KeePass password safes |
| krb5-strength | | Kerberos kadmind strength checking plugin |
| kstart | | Kerberos v5 kinit daemon that uses keytabs |
| kwallet | | Secure and unified container for user passwords |
| kwalletmanager | | KDE wallet manager |
| lasso | | Liberty Alliance Single Sign On implementation |
| lastpass-cli | | Command line interface to LastPass.com |
| libassuan2 | | IPC library used by some of the other GnuPG related packages |
| libb2 | | C library providing BLAKE2b, BLAKE2s, BLAKE2bp, BLAKE2sp |
| libbf | | Blowfish block cipher library |
| libcrack | | Password checking library |
| libcurvecpr | | Uses elliptic-curve cryptography to encrypt and authenticate data |
| libdecaf | | Implementation of Ed448-Goldilocks elliptic curve for cryptography |
| libdes | | Small DES (Data Encryption Standard) lib & standalone program |
| libfido2 | | U2F/FIDO/FIDO2 library and tools |
| libfprint | | Fingerprint reader access library |
| libgabe | | Ciphertext-Policy Attribute-Based Encryption library |
| libgcrypt | | GNU cryptographic library |
| libgfshare | | Library to implement Shamir's secret sharing scheme |
| libgnome-keyring | | GNOME password and secret manager |
| libgpg-error | | Definitions of common error values for all GnuPG components |
| libidea | | IDEA block cipher library |
| libident | | Small library to interface to the ident protocol server (rfc1413) |
| libjwt | | JWT C library |
| libkleo | | KDE PIM cryptographic library |
| libksba | | X.509 library |
| libmcrypt | | Crypto algorithms library |
| libmerkletree | | Calculate and verify Merkle tree digests |
| libmultigest | | Multiple, concatenated digest value calculation library |
| libnetpgpverify | | PGP and ssh signature verification library |
| libnitrokey | | Library to communicate with Nitrokey devices |