quizchain2/23

Solved on 2019-05-30 after 3h 12m, key derived from the published recipe. 0.007 BTC on Bitcoin.

Story

What the post asked, what the answer turned out to be, and what the chain says happened. The record below holds the data.

Two letters

May 30, 2019, eight minutes after the block 22 post. The question is PG. The format is [solution] TOMI [TOMI], with digits 593, 4 and 5.

The funding confirmed twelve minutes before the post this time. Lesson learned from block 22: fund close to posting, so nobody gets a five hour head start.

PG is short a letter. Which one? Add P and you get PGP, Pretty Good Privacy. So the solution is just P, and the TOMI field is Pretty Good Privacy. The author picked it for Bitcoin's cypherpunk roots.

u/mooncritic tried Project Gutenberg. Not bad. Not it.

The claim confirmed at 15:55:40 UTC, about three hours in. Nobody posted the string. u/puzzleponky called it a good block, "not too easy but a nice solution with an obvious TOMI". A one letter solution that still needs a TOMI field. That's the brute force fear in a nutshell.

IDquizchain2/2323 / 772019-05-30

Puzzle / quizchain2

23

bitcoinp2pkh solved

Record

puzzle({
  chain: "bitcoin",
  address: "14bavWYFj3GD…u6oce4zT",
  status: Status.Solved,
  key: wif("L1VFUsRTgdYZ…Lvpvhn4X").entropy("5933d9f1db6f…cc8e62b3", source("https://www.…lock_23/")).derived(),
})

Prize: 0.007 BTC
Key material: wif, derived from the recipe
Verification: verified
Solved: 2019-05-30 · 3h 12m

tx 2

Trail: Explorerblockstream.info; Sourcereddit.com/r/Grycoin/comments/bustcu/7_mbtc_quizchain2_block_23; Tryquizchain2/23 in the playground

Address: 14bavWYFj3GDbXG3KJihTUuWaZu6oce4zT

hash160 2772d6522448004d5a704cf648a48618c06133bb

Balance

asking the explorer

Key

public key · compressed: 03ed49b3afa2b4bd7762ee3855d0cb25d8a9ac086ca86353e984ab164dc68cfa19
WIF: L1VFUsRTgdYZnFGdX14RNb9e8AoWHgmRTsn51b3DYhMjLvpvhn4X
entropy hash: 5933d9f1db6fbd064cf19004cc8e62b3
entropy source: MD5 of the letter, TOMI and three words

Transactions

funding2019-05-300.007 BTCf3f49ed66c…dd98c0
claim2019-05-300.00665811 BTC9bd5338638…3fa8d4

Files

Techniques

md5-to-bip39-entropypuzzlereddit.com/r/Grycoin/comments/bustcu/7_mbtc_quizchain2_block_23

Hints

undated
officialQuestion: PG
Sourcereddit.com/r/Grycoin/comments/bustcu/7_mbtc_quizchain2_block_23
Published answer
Solution was "P" and TOMI field was "Pretty Good Privacy". I wanted to use this idea because the link to Bitcoin's cypherpunk roots.
Sourcereddit.com/r/Grycoin/comments/bustcu/7_mbtc_quizchain2_block_23
undated
officialFormat: [solution] TOMI [TOMI]
Sourcereddit.com/r/Grycoin/comments/bustcu/7_mbtc_quizchain2_block_23
undated
officialFirst 3 digits of MD5 hash are 593.
Sourcereddit.com/r/Grycoin/comments/bustcu/7_mbtc_quizchain2_block_23
undated
officialFirst digit of solution only MD5 hash is 4.
Sourcereddit.com/r/Grycoin/comments/bustcu/7_mbtc_quizchain2_block_23
undated
officialFirst digit of TOMI field only MD5 hash is 5.
Sourcereddit.com/r/Grycoin/comments/bustcu/7_mbtc_quizchain2_block_23