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Author Topic: Bitcointalk Crossword Puzzle - Round 2  (Read 171 times)
hugeblack
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September 23, 2019, 07:28:04 AM
Merited by o_e_l_e_o (1), dkbit98 (1)
 #1

passcode for Bitcointalk Crossword Puzzle (Which will show the solution): the smallest unit of bitcoin S____
play it online ----> https://crosswordlabs.com/view/bitcointalk-crossword-puzzle-round-2
print it ---->  https://i.imgur.com/VpIrPWj.jpg or https://crosswordlabs.com/pdf/bitcointalk-crossword-puzzle-round-2

If you have new suggestions or ideas for the next round please DM me.
I've removed the prize and made the game just for fun, but every several rounds will add a prize.
I hope you like it, it took me about half an hour to make it fun and useful.

Enjoy!

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September 23, 2019, 07:20:12 PM
 #2

7 down is incorrect. Tongue

In the event of a 51% attack, the attacker can reverse all transactions from the block they choose to start their attack from. If they started mining their own blocks from say a 5 block deficit, when they finally overtook the main chain and became the new longest chain, all transactions in those 5 blocks plus in any subsequent blocks mined since the attack started, would no longer be part of this new chain (unless the attacker had also mined them). Since they are no longer part of the new main chain, this means they never happened and so effectively would be reversed.

Other than that, good job! The "_" did throw me a little. Usually crossword answers which are made up of more than one word just have all the words sandwiched together without spaces or other punctuation.

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September 25, 2019, 06:42:32 AM
 #3

In the event of a 51% attack, the attacker can reverse all transactions from the block they choose to start their attack from. If they started mining their own blocks from say a 5 block deficit, when they finally overtook the main chain and became the new longest chain, all transactions in those 5 blocks plus in any subsequent blocks mined since the attack started, would no longer be part of this new chain (unless the attacker had also mined them). Since they are no longer part of the new main chain, this means they never happened and so effectively would be reversed.
Your words seem logical but I took the quote from this text:

Quote
Even in the event that an attacker gains more than 50% of the network's computational power, only transactions sent by the attacker could be reversed or double-spent. The network would not be destroyed.
You can find the text on this page ----> https://bitcointalk.org/adrotate.php?adinfo
But what happens after the attack ends and returns to the longer "real" chain? Only attacker transactions are canceled. Which means it's the only one that can be reversed.

if there are any mistakes in the text above I wish theymos modified it because it is considered a source of information.

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September 25, 2019, 09:22:03 AM
 #4

Ahh, we are getting confused on terminology here.

The attacker can reverse other users' transactions as I described above, but this does not cancel them. It would simply return them to the mempool with zero confirmations. Once the attack ended, these transactions would be available for honest miners to mine again (provided the owner of the transaction didn't try to RBF them in the meantime). Having said that, a 51% attacker is incentivized to include all these transactions on their corrupt chain to benefit from the transaction fees when their corrupt chain takes over.

It is correct to say that an attacker could only double spend their own coins, as they need the relevant private key to generate a second transaction.

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September 25, 2019, 10:12:08 AM
 #5

Damn I stuck on 1 and 13... for 1 a have a few solutions but for 13.. no chance at all.
So I almost solved it.
Nice puzzle btw Smiley

Love those ones

When I come solve it I can post the solution Wink but I'm sure someone will be before me.

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September 25, 2019, 10:33:05 AM
 #6

13 is actually two words separated by a underscore. 7 letters then 3 letters.
1 is also a part of your head.

See if that helps!  Smiley

There is an answer key which hugeblack has given the password for in his first post, so no need to post the solution.

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September 25, 2019, 10:59:57 AM
 #7

13 is actually two words separated by a underscore. 7 letters then 3 letters.
1 is also a part of your head.

See if that helps!  Smiley

There is an answer key which hugeblack has given the password for in his first post, so no need to post the solution.

*facepalm* I just saw now what hugeblack posted. Then there is no point to post the answers anymore.
Regading the 13, I would never guess what it was. There should be a tip somewhrere that you are looking for two words. Maybe the two words should be put toghter without the underscore.

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January 05, 2020, 09:29:32 PM
 #8

Regading the 13, I would never guess what it was. There should be a tip somewhrere that you are looking for two words. Maybe the two words should be put toghter without the underscore.
Generally, in crossword puzzles a multiword answer is listed with a hint to the number of letters in each word... like this: "The most important part of Bitcoin (7,3)"... and they don't use _'s to separate words, they just run together... like this: "privatekey"

Still, a fun 5 minute diversion. Thanks for the puzzle...

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