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On Christmas,I received a letter, looking at the sender, I found nothing, except an 'anonymous'. I didn't understand why, but as I kept reading, it finally dawned to me that this is a puzzle, and here it is.

What ye may think of this, a puzzle! What ye need to figure out, a passcode. >Axcjcn kh 9 mrprcb.. Vh oacnwm. Jb hqd vjh fnnu taxf cqnc cq b rb j yjiiun, R frau wxc odncqna rwc8xmdun hnd cx fqcc cqcb rb jkndc, unc’b bajac. I will give you a few sentence, and that's all you'Il need to figure out what you have to do to get the gift.. ;) good luck! "I'm something useful, untouchable, yet buyable. I am expensive, however l'm not sensitive, I feel nothing. I'm the 2nd generation, without DNA. What l'm worth? I go up and down. I'm short with 3 letters. But guess what? I'm useful! I power many of my kinds, my cost is at 4 digits, and without me, most of my kinds wouldn't even exist. I guess l'm pretty important then..." That's it! Figure what I am talking about...send me back a letter, and l'll give you one of it!

Best of luck,

Anonymous

Of course I want the gift!, so help me!

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1 Answer 1

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Looks like you might be receiving some

ETHEREUM


First step:

The encrypted text is encrypted with ROT9 and can hence be decrypted with ROT17. It gives:

'Rotate by 9 digits.. My frtend. As yhu may weel krow thet th s is a pazzle, I wirl not fuether int8odule yeu to whtt thts is abeut, let’s srart.'

Second step:

There are lots of spelling errors, but they seem to be intended. Lets see what the 'errors' say:

'THERE ARE 8 LETTER'

This seems to give the length of the answer


So lets look at the riddle, to which the answer is

ETHEREUM


I'm something useful, untouchable, yet buyable. I am expensive, however l'm not sensitive, I feel nothing.

Ethereum is a cryptocurrency, which is expensive but not tangible, nor is it a living thing, making it not sensitive.

I'm the 2nd generation, without DNA. What l'm worth? I go up and down.

Ethereum is known as the second generation cryptocurrency, with Bitcoin the first. Cryptocurrencies are well known to be very volatile in price.

I'm short with 3 letters. But guess what? I'm useful!

All cryptocurrencies have a 3 letter abbreviation, with ETH being Ethereum's.

I power many of my kinds, my cost is at 4 digits, and without me, most of my kinds wouldn't even exist. I guess l'm pretty important then...

Ethereum can act as a platform for other cypto coins to work off. At this point in time, a single coin is currently valued at roughly $3774 or £2999, a 4 digit cost.

And the bonus clue

ETHEREUM is 8 letters!


Seems like a pretty good Christmas present!!

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  • $\begingroup$ Yessir! Great job, now I’ll get a 4 thousand coin, all thanks to you :) $\endgroup$
    – AntsPiano
    Commented Jan 4, 2022 at 3:07
  • $\begingroup$ But how can you send a letter back to "Anonymous" without address. If there was an address then it's technically not "Anonymous". $\endgroup$
    – WhatsUp
    Commented Jan 4, 2022 at 4:10
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    $\begingroup$ @WhatsUp an envelope can have a ‘return to’ address on it, and the persons names still unknown so are still anonymous $\endgroup$ Commented Jan 4, 2022 at 4:12

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