Arm Mbed OS support forum

ECDSA using mbedtls Library

I am using function “mbedtls_pk_parse_key” for parsing the ECC private key and function “mbedtls_pk_sign” for signing of hash of massage.
I am getting Same signed massage when i fixed the private key and hash of massage i.e deterministic version.
But i need different signed massage each time what should i do