Analyze the theoretical foundations of quantum-resistant cryptography and its significance in safeguarding digital communication against quantum attacks. Quantum-resistant cryptography involves the development of cryptographic algorithms and protocols that remain secure even in the presence of powerful quantum computers capable of breaking classical cryptographic schemes such as RSA and ECC. By exploring cryptographic primitives based on problems believed to be hard for both classical and quantum computers, engineers can design quantum-resistant cryptographic systems for securing sensitive data and communication channels in the post-quantum era.