PQCrypto Usage & Deployment

Updated: February 18, 2019

Here's a list of software that incorporate PQCrypto (post-quantum cryptography), that is, cryptography resistant to attack from quantum computers.

Note on QKD: Quantum Key Distribution, an unrelated technology, is probably snake oil. It will not be discussed here.

Background information


libpqcrypto is a new cryptographic software library produced by the PQCRYPTO project, that includes software for 77 cryptographic systems (50 signature systems and 27 encryption systems) from 19 of the 22 PQCRYPTO submissions.

Symmetric / secret-key cryptography

Grover's algorithm will reduce symmetric cipher security by a square root. So against a quantum computer running Grover's algorithm, AES-256 will provide a comfortable security level of 2^128. However, AES-128 will only provide a security level of 2^64, rendering it broken. (Keep in mind that attackers are storing ciphertext now for later analysis.) The following ciphers are recommended for long term security against quantum cryptanalysis:

Public-key cryptography

Signatures: SPHINCS+

Note: SPHINCS+ has made it to round 2 of the NIST PQC Standardization Process.

Signatures: SPHINCS-256


Software that combines pre-shared keys with a classical key exchange, e.g. X25519, is worthy of mention.


Post-quantum crypto library for the ARM Cortex-M4

The pqm4 library, benchmarking and testing framework started as a result of the PQCRYPTO project funded by the European Commission in the H2020 program. It currently contains implementations of 8 post-quantum key-encapsulation mechanisms and 3 post-quantum signature schemes targeting the ARM Cortex-M4 family of microcontrollers.


Post-quantum crypto implementations for the FPGAs

The pqhw implementations are a result of the PQCRYPTO project funded by the European Commission in the H2020 program. Note that these are research oriented implementations and not ready for productive use. It is published under the license contained in the license.rtf file and allows evaluation by academics but no commercial use.

Help wanted!

See also

The following have not been recommended by the PQCRYPTO Project, but are worthy of further study and experimentation.

Key Exchange: Newhope


Timeline notes

See also this Wikipedia article for further reading.

Post-quantum crypto support coming soon!

"Powered by Post-Quantum Crypto"