A viral X post claims that Claude ‘cracked’ a forgotten bitcoin wallet to recover 5 BTC from a user’s computer.
But don’t get caught up in the hype, because that’s not what happened. Anthropic’s AI simply helped the owner search their own computer for an old wallet file, which was then decrypted with a password the owner had already written down in a notebook.
User cprkrn posted the recovery on Wednesday, calling it “the most obvious opening ever” when they found out what had happened.
The owner had been trying for eight weeks to brute-force the password on their current Blockchain.com wallet, testing about 3.5 trillion combinations using the btcrecover service on a rented computer chip.
The recovery occurred when the user “dumped my entire college computer into Claude” as a last-ditch effort, and the assistant found an old wallet backup from December 2019 that was encrypted with a password the user had already written down in a notebook.
The old password decrypted the old backup, which contained the same private keys that control the current funds, since bitcoin private keys never change.
The password itself was “lol420fuckthePOLICE!*:)” according to the user’s own X disclosure. The total Vast.ai GPU usage on the failed brute-force attempts was about $15, with the recovery essentially a file search.
To break bitcoin’s actual cryptography would require either a working quantum computer running Shor’s algorithm or a flaw in elliptic curve cryptography that has not been found in 16 years of public investigation.
CoinDesk’s post-quantum security series earlier this year covered timeline expectations for this threat, with most researchers placing the cryptographically relevant quantum computer at least five to ten years out.
But the user experience opens another door for AI inside crypto. Forgotten wallets from bitcoin’s early years now have serious value, and recovery tools like btcrecover have been around for years to help users test password variations against encrypted wallet files.
The problem has always been that most recovery work requires technical expertise that the average lost bitcoin owner does not have.
This is where AI assistants can step in. Instead of manually sorting through folders, timestamps and backup files across years of accumulated drive clutter, owners can leave the search to an LLM and have it identify patterns, narrow the search space and display candidate files.
Millions of bitcoin are believed to remain inaccessible because owners lost passwords, drives or recovery phrases in the early years.
With bitcoin turnover around $79,000, a forgotten laptop in a closet can hold six figures. Back up wallet data carefully, save recovery phrases somewhere other than your memory, and check old hardware before selling it.
