🧪 Communication Advanced Blockchain Communication Simulation

This simulator shows how blockchain technology secures a decentralized communication network: every message becomes a block in a SHA-256 hash chain, and a ring of peer nodes independently re-verifies each new block against the ledger it already holds. Send a message and watch it propagate to every peer for confirmation; run a spoofing attack and see the network reject a message whose sender identity doesn't match the public identity hash registered at genesis; or tamper with a past block's text and watch the hash chain visibly break from that point forward, red blocks cascading down the ledger to demonstrate why blockchain-anchored records resist silent tampering and impersonation.