List of cryptographic software

This is a list of cryptographic software, including software, libraries, protocols, algorithms, services, and operating-system components used for cryptography, encryption, digital signatures, authentication, secure communication, disk encryption, public-key infrastructure, and related functions.

Email and OpenPGP encryption software

Secure messaging, voice, and communication software

Secure Shell, secure transfer, and tunneling software

TLS and SSL implementations

VPN software, protocols, and services

VPN software and protocols

Disk encryption and encrypted file systems

General encryption software and utilities

Cryptographic libraries and APIs

Public-key infrastructure, certificates, and smart-card software

Password managers and authentication software

Anonymity, privacy networks, and private storage services

Homomorphic encryption and research software

Cryptography languages

Cryptol

Cryptography verification tools

Security-focused operating systems and platforms

Anti-forensics and physical-security utilities

Cryptographic algorithms and primitives

Cryptocurrency wallets, clients, and privacy protocols

Cryptocurrency wallet and client software

Privacy-focused cryptocurrencies and protocols

Blockchain interoperability protocols

Hyperbridge

Quantum and post-quantum cryptography

Quantum key distribution protocols

Post-quantum algorithms and standards

Other cryptographic and security software

Debian — general-purpose Linux distribution that includes many cryptographic libraries, tools, and packages.
Libdvdcss — library for decrypting DVD-Video discs.
Mujahedeen Secrets — encryption software associated with jihadist communications.
Sichere Inter-Netzwerk Architektur — German secure networking architecture.
Sha1sum — command-line utility for computing SHA-1 hashes.
Syskey — former Windows utility for encrypting account-password data.

References

↑ "Category:Security/encryption". Free Software Directory. Free Software Foundation. Retrieved May 27, 2026.
↑ "Debian -- Package Search Results -- encryption". Debian. Retrieved May 27, 2026.
↑ "All Projects". PRISM Break. December 19, 2024. Retrieved May 27, 2026.
↑ Abushgra, Abdulbast A. (2022). "Variations of QKD Protocols Based on Conventional System Measurements: A Literature Review". Cryptography. 6 (1): 12. doi:10.3390/cryptography6010012.
↑ "NIST Announces First Four Quantum-Resistant Cryptographic Algorithms". National Institute of Standards and Technology. July 5, 2022. Retrieved May 31, 2026.

[fsf-directory-encryption-1] "Category:Security/encryption". Free Software Directory. Free Software Foundation. Retrieved May 27, 2026.

[debian-packages-encryption-2] "Debian -- Package Search Results -- encryption". Debian. Retrieved May 27, 2026.

[prism-break-all-projects-3] "All Projects". PRISM Break. December 19, 2024. Retrieved May 27, 2026.

[4] Abushgra, Abdulbast A. (2022). "Variations of QKD Protocols Based on Conventional System Measurements: A Literature Review". Cryptography. 6 (1): 12. doi:10.3390/cryptography6010012.

[5] "NIST Announces First Four Quantum-Resistant Cryptographic Algorithms". National Institute of Standards and Technology. July 5, 2022. Retrieved May 31, 2026.