Jump to content


Welcome to BrainDen.com - Brain Teasers Forum

Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account.
As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends.

Of course, you can also enjoy our collection of amazing optical illusions and cool math games.

If you like our site, you may support us by simply clicking Google "+1" or Facebook "Like" buttons at the top.
If you have a website, we would appreciate a little link to BrainDen.

Thanks and enjoy the Den :-)
Guest Message by DevFuse
 

Photo
- - - - -

Five encrypted thoughts


  • Please log in to reply
18 replies to this topic

#11 voider

voider

    Junior Member

  • Members
  • PipPip
  • 50 posts
  • Gender:Male

Posted 01 August 2011 - 08:54 AM

It is easy to encrypt as specified with the aid of a spreadsheet but the encryption will always be a symmetrical string. Given either first half or last half of solution, it would be easy to determine the other half with a spreadsheet. The problem arises that every letter in the encrypted can be any one of at least 13 different combinations. If you do not know one, you cannot positively identify the other. Bottom line, this cannot be decoded by any algorithm. With sufficient hints and basic word composition rules, we could eventually get the answer but it would be an elaborate maze of guesses, especially since no spaces are provided for word division.

Okay, letter by letter is getting me nowhere fast. I think that a brute force with a dictionary could probably break this pretty quickly though, but I do not have access to that other than manually, which would be pretty slow. I can find a word if it is in there somewhere, so I will ask for a word hint please.

Each character can be decoded into one of 26. Even using a dictionary, the biggest problem is not speed (though it is a major issue anyway), but how to recognise words. The most commonly used dictionary has 250000 words, which is too many. If a search algorithm accepts words of any length, then the search would start off creating many trivial words like BA or CA, words that are virtually never used; there is no easy way to distinguish MEANINGFUL words. This might be faintly plausible if I could find a dictionary of common words only.
  • 0

#12 voider

voider

    Junior Member

  • Members
  • PipPip
  • 50 posts
  • Gender:Male

Posted 01 August 2011 - 10:36 AM

The five words corresponding to THOUGHT:
81:87 SHORTY
110:114 NEAR
250:253 SORE
211:215 REAR
228:232 HUNT

Is there slang in this?

If I had nothing else to go on, I would start looking for "near the", "is sore", "hunt the", "a thought", "thought of" "i thought", etc.
  • 0

#13 Nana7

Nana7

    Senior Member

  • Members
  • PipPipPipPip
  • 874 posts

Posted 01 August 2011 - 11:48 AM

Spoiler for initials of quotee


I already have it solved, though I used the word hint to get enough words going the other way to let me use google to get the full quote. That might be kind of cheating the point of a decrypt though, so I have not posted anything.

Voider, I think your algorithm may have an error. Those words are not the ones I have going the other way if the word thought is put at those positions. Assuming the first letter is letter 1, if thought is entered at 81-87, the corresponding section in the other half is

Q K G E G U N
although if you entered "thought" at position 79, I see you would get "trohsfv" going the other way, but the word "short" is in there backwards and has the unlikely combo "fv" after it. I checked your other locations and the words are all backwards. Entering thought at letter 81 should give you qkgegun for the other side, and entering thought at 79 should give trohsfv. What I have is correct since I did enter the actual quote in the first half and checked the 2nd half to verify it all worked and to have a copy of the quote as encrypted in case there were any changes made to the one I found on google.
  • 0

#14 thoughtfulfellow

thoughtfulfellow

    Advanced Member

  • Members
  • PipPipPip
  • 218 posts

Posted 01 August 2011 - 01:10 PM

Please tell me if I am on the right track
Spoiler for What I think is right so far

  • 0

#15 Nana7

Nana7

    Senior Member

  • Members
  • PipPipPipPip
  • 874 posts

Posted 02 August 2011 - 07:42 AM

Spoiler for for thoughtful

  • 0

#16 Chronic

Chronic

    Newbie

  • Members
  • Pip
  • 3 posts

Posted 23 July 2012 - 11:51 PM

Spoiler for Answer


I hope that's it because I've tried to solve this one for a looooooong time.


if not, hey i tried. :duh: I like the quote though. ^_^

Edited by plainglazed, 24 July 2012 - 02:46 PM.

  • 1

#17 Chronic

Chronic

    Newbie

  • Members
  • Pip
  • 3 posts

Posted 24 July 2012 - 02:12 PM

I just wanted to say to all you puzzle solvers on this post that I am sincerely sorry if I ruined the fun for blurting out what I thought was the answer. I was so thrilled to think I had solved it, that I didn't think about that possibility. I tried to erase it, but it will no longer let me edit that post. Again, very sorry if that was the answer, but crack on fellow puzzlers! My hat off to you!

EDIT: no worries, thanks for your concern - added the spoiler tags above - welcome to the Den Chronic. - plainglazed


  • 0

#18 superprismatic

superprismatic

    Not just Prismatic

  • Moderator
  • PipPipPipPip
  • 1281 posts
  • Gender:Male

Posted 24 July 2012 - 04:48 PM

Spoiler for Answer


I hope that's it because I've tried to solve this one for a looooooong time.


if not, hey i tried. :duh: I like the quote though. ^_^

Indeed, you've got it. Nice going!
  • 0

#19 Chronic

Chronic

    Newbie

  • Members
  • Pip
  • 3 posts

Posted 22 August 2012 - 10:38 PM

Many thanks for the "spoiler tags"...I'm still trying to figure this place out. Funny I can solve a puzzle but not how to work a web site! And I can't tell you how ecstatic I am that I actually had the correct answer! When it first came out I worked on it for such a long time that I finally had to stop because my eyes were twitching from the strain. Superb puzzle and I can't wait to find another like it!
  • 0




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users