Quantum computers pose a significant challenge to the security of cryptocurrencies and blockchain-based assets. Current cryptographic systems rely on mathematical problems that are extremely hard for classical computers to solve, like factoring large prime numbers. However, quantum algorithms such as Shor’s algorithm can solve these problems exponentially faster.

Here are the four main risks posed by quantum computing to crypto assets:

  1. Breaking Private Keys

    Quantum computers can break the cryptographic schemes protecting private keys, making it possible to steal funds from wallets. It’s estimated that around 4,000 logical qubits would be needed to break widely used public-key cryptography, such as RSA and ECC (Elliptic Curve Cryptography).

  1. Dominating Mining

    Quantum computers could outperform classical miners, monopolizing block creation and disrupting the network’s fair distribution of rewards.

  2. Smart Contract Vulnerabilities

    Quantum attacks can target smart contracts and decentralized applications, potentially changing their behavior or bypassing security measures.

  3. Loss of Trust

    If quantum attacks become feasible, trust in blockchain networks could erode, leading to a collapse in confidence and the value of digital assets.


Currently, the IBM Condor chip – with 1,121 qubits – represents a major milestone. Google’s research suggests that millions of physical qubits would be needed for large-scale quantum error correction, so we’re not yet at the point of quantum supremacy in breaking crypto, but progress is accelerating.

Stay tuned – more insights coming in the next parts!
If you missed the previous part, you can find it here.

#CryptoSecurity #quantumcomputing #BlockchainSecurity #QuantumThreat

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