DSA Postquantum standardization candidate reported here: https://crypto-kantiana.com/main_papers/main_Signature.pdf

• gcc compiler >= 9.2.1
• OpenSSL library development package

Clone the repository files to some folder, e.g. ~/PQS, then execute the following commands to compile the project:

cd ~/PQS/Signature/
make

Run PQS testing script

./pqs_test

All the desired parameters for testing script as well as the signature parameters itself can be adjusted in header files config.h, params.h.

In order to use this implementation in external project, include sign.h header file into your project and follow the instructions below.

#include "~/PQS/Signature/sign.h"

1. Allocate memory for public key, private key and signature by declaring variables having special data types vk_t, sk_t, signat_t respectively;
2. Generate a keypair by calling

PQS_keygen(vk, sk);

3. Load the message to be signed to array unsigned char m[] of length int mlen bytes
4. Sign the message by calling

PQS_sign(sig, &m[0], sizeof(m), sk, vk);

5. Verify the signature stored in sig by calling a verification procedure

bool success = PQS_verify(sig, &m[0], sizeof(m), vk);

Please refer to the following paper for more details: https://crypto-kantiana.com/main_papers/main_Signature.pdf