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Blockstream CEO Adam Back pushed back on concerns that quantum computing poses an imminent threat to Bitcoin’s cryptographic security, arguing that current progress in the field remains far from the level required to break real-world encryption.

Speaking in an interview with Bloomberg, Back noted that much of today’s quantum research is still in its early experimental phase. He pointed to the limited capabilities of existing quantum hardware, which often lacks full error correction and has only demonstrated trivial computations. “The biggest calculation it’s performed is factoring 21 into 7 times 3,” he said, emphasizing that today’s machines remain closer to laboratory prototypes than practical computing systems.

While recent academic work has highlighted potential algorithmic improvements, Back argued that these advances do not yet translate into meaningful hardware capability. 

As a result, he said, the prospect of quantum computers capable of threatening Bitcoin’s elliptic curve cryptography remains “decades off,” though he acknowledged uncertainty around exact timelines.

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