Implement PQC Handshake and Data Encryption

implementationChallenge

Prompt Content

Implement the initial secure channel establishment between two nodes using PQC. Use a Post-Quantum Key Encapsulation Mechanism (KEM) like Kyber and a Post-Quantum Digital Signature Algorithm (DSA) like Dilithium (e.g., via `pqc-py` or a similar library) to securely exchange a classical AES-256 key. Demonstrate its use to encrypt and decrypt a sample message.

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