1FCYd7j4CThTMzts78rh6iQJLBRGPW9fWv

P2PKH (1)

Run validateaddress Build descriptor JSON

Quantum exposure Reuse-exposed

P2PKH · reuse-exposed

P2PKH addresses hide the pubkey behind a SHA-256 + RIPEMD-160 hash UNTIL the first outgoing spend, which reveals it in the signature script or witness data. This address has been spent from, so its pubkey is permanently on chain. Every subsequent UTXO at this address is just as exposed as the moment of first spend.

First revealed at block 238,491 on 2013-05-29 (input_spend).

Context: Bitcoin quantum exposure report · Top exposed addresses · Quantum and Bitcoin (LearnBitcoin.com)

What we know about this address 6 findings

Peter Todd (Bitcoin Core developer)

Self-disclosed signature address of Peter Todd (u=2546), Bitcoin Core developer and prolific cypherpunk. Active in protocol research from 2011 onward; known for OP_RETURN, RBF (Replace-By-Fee), and the original CHECKLOCKTIMEVERIFY opcode.

label view
bitcointalk

tag
self-disclosed

tag
signature

tag
core-developer

tag
history

tag