[QCA]Encrypt with public key and decrypt with private key !

Hi, When i use QCA, I can’t encrypt with public key. In documentation, public key is for decrypting and private key is for encrypting but the asymetric system don’t like this. If we want garantee non-repudiation we need to encrypt with public key ! Can someone tell me how solve this problem or ask me if it’s a limitation of QCA ? Regards, Mohamed