A Cryptocurrency like Bitcoin represent more than a digital currency. Its open ledger system leap for civilization, ushering in a new era of transparency and innovation.

In 2008, the pseudonymous Satoshi Nakamoto posted a white paper describing an

Implementation of a digital currency called bitcoin that used blockchain technology.

Cryptocurrencies embrace a peer-to-peer mechanism and efectively eliminate the middle man, which could be a financial institution. For example, no bank account or credit card is needed to transact in the world of cryptocurrencies. Indeed, a cryptocurrency wallet serves the same function as a bank vault.

The technology, however, goes well beyond providing banking services to the unbanked.

It holds the potential for cheap, secure, and near-instant transactions, allowing billions of people to join the world of internet commerce, paying, and being paid, for goods or services, outside of the traditional banking and credit card infrastructure.

Our concern here is the security of the transaction.

The history of cryptography is a perpetual arms race. Since Bitcoin’s inception in 2009, an invisible Sword of Damocles has hung over the network : quantum computing. Long relegated to the realm of science fiction or a distant horizon, this technological threat is beginning to cast a concrete shadow over the security of global financial systems. Today, Bitcoin’s response is taking shape with BIP-360, but the real battle will be fought on the terrain of digital signatures.

This is not just a technical update ; it is an architectural paradigm shift. Facing the existential risks posed by the exponential computing power of Qubits, BIP-360 introduces an elegant mechanism to protect certain transactions. While it is not the definitive “silver bullet,” it constitutes the first bulwark, the first fortified line of defense for a digital citadel preparing for a siege

To understand the importance of BIP-360 and future solutions like SPHINCS+, one must first grasp the nature of the threat. Bitcoin’s security currently relies on Elliptic Curve Cryptography (ECDSA) and Schnorr signatures (introduced with Taproot). These algorithms are unbreakable for our current classical supercomputers. It would take the most powerful computer in the world billions of years to deduce a private key from a public key.

However, quantum computing changes the rules of the game. By utilizing the properties of superposition and quantum entanglement, a specific algorithm—Shor’s algorithm—could theoretically break these mathematical problems in a few hours, or even minutes.

In conclusion we are still at the theoritical stage of the hypothesis that a quantum computer could break the security of the Cryptocurrency transaction. The future will maybe give us a clear answer in the practice.