[TheDubWubCub]

Welcome to my Decryption/Decoding Puzzle Contest!

*The Contest is over!
All challenges have been completed!
Thank you all very much for participating!
If you would like to be notified of the next contest, please PM me!
Thanks again & Good luck on the next one! :D*

About these contests:
Each contest will contain at least one challenge/puzzle to be solved for a prize and prizes will vary for each challenge! :D

About this contest:
There are 5 challenges for you HF!
Each challenge varies from easy to hard difficulty, but the harder = more prize $$! :D

The goal is to successfully decode the cipher-text of the challenge.
Each challenge will provide 3 example inputs(message) and their outputs(cipher-text) and then the final cipher-text to be decoded.
Post your results below and if correct, you will be rewarded with the prize $$ of that challenge! :D

Rules:
- You may enter/attempt all challenges!
- You only get two guesses/attempts per challenge!
- Entering more than two guesses/attempts per challenge will disqualify you from that challenge!
- Once a challenge has been completed/solved, details on how that challenge was made will be updated in the thread!
- If you have won the challenge, you will be payed the amount of that challenge's prize $$ via PayPal!
- The contest will end by June 21st or once all challenges have been completed!
- Only one hint will be given publicly per challenge!
- Have Fun! 🤗

Example Post/Entry:
(Given that these are the cipher-texts:)

*example* Challenge 1: Cipher-Text: "JRGjFV3" *example*
*example* Challenge 2: Cipher-Text: "ERHGeHcJ" *example*
*example* Challenge 3: Cipher-Text: "SDVJj2" *example*
and so on...

Your post/entry should look something like this:

Challenge 1
Input: hello (guess/attempt #1)
Input: doggy (guess/attempt #2)

Challenge 2
Input: frog (guess/attempt #1)
Input: cat123 (guess/attempt #2)

Challenge 3
Input: silver (guess/attempt #1)
Input: wub2 (guess/attempt #2)

and so on...

Now on to the Challenges!

*SOLVED BY "Azureal"* Challenge #1 - Difficulty Easiest - $1 Prize! *SOLVED BY "Azureal"*

Spoiler (Click to View)

Welcome to challenge #1 of this contest!
This challenge is the Easiest of the 5, so hurry up & complete it before someone else does!
Completing this challenge will earn you $1 according with the rules!
The only rules for this challenge are the rules for the contest, which can be located above!
With all this said, here is your challenge! 😈

Figure out what the input/message is of the following Cipher-Text:

Cipher-Text: vnlxovD lg bn gnvgmlx

Here are 3 input/output examples of the encoding algorithm used for this challenge:

Example 1:
Input: HackForums
Output: hnfilUpxzS

Example 2:
Input: encode
Output: vwlxmv

Example 3:
Input: Peace
Output: vxzvK

HINT: Not Given Yet

Good luck on this challenge and remember to follow the format when you're making your post/entry! 👍



How the algorithm works:
Spoiler (Click to View)
Input: Hello

Step1: Reverse (abc=cba)

Hello = olleH

Step2: Opposite Letter
( a=z, b=y, c=x, d=w, e=v,f=u,g=t,h=s,i=r,j=q,k=p,l=o,m=n,n=m,o=l,p=k,q=j,r=i,s=h,t=g,u=f,v=e,w=d,x=c,​y=b,z=a)

olleH = loovS

Output: loovS


*SOLVED BY "deimoo92"* Challenge #2 - Difficulty 2nd Easiest - $3 Prize! SOLVED BY "deimoo92"*
Spoiler (Click to View)

[color=#00BFFF]Welcome to challenge #2 of this contest!
This challenge is the 2nd Easiest of the 5, so complete it quick before someone else does!
Completing this challenge will earn you $3 according with the rules!
The only rules for this challenge are the rules for the contest, which can be located above!
With all this said, here is your challenge! 😈

Figure out what the input/message is of the following Cipher-Text:

Cipher-Text: H;P/f:i/f:j/b:c/r;x/p:e/b:j/h;t/d:u o:e/c:e/j;e/n:e/j;e d;g/k;s/e;f/f:f/a;m/b;g/k:c/c;j/c:a/k:h w;x/f;x/s;x b;p/d;s/l:h a:s/d;s/g:h c:a/q;z/a:e/k;q/r;i/q;t/c:r/h:d/l:h

Here are 3 input/output examples of the encoding algorithm used for this challenge:

Example 1:
Input: HackForums
Output: D:D/c;d/c;f/f;q/K;Q/a;p/q:a/j:k/g:f/q:b

Example 2:
Input: encode
Output: m;r/h;v/a:b/g;v/n;r/g;l

Example 3:
Input: Peace
Output: C;S/s;x/t;u/n;q/n;s

HINT: *Not Given Yet

Good luck on this challenge and remember to follow the format when you're making your post/entry! 👍



How the algorithm works:
Spoiler (Click to View)
Input: Hello

Note: The process of generating the letters is a bit complicated, so i will just show how to decipher it.

Output: R;Z/u;z/n;z/n;z/k;z

Info: ; = subtraction, : = addition, / = separator
( a=1, b=2, c=3, d=4, e=5,f=6,g=7,h=8,i=9,j=10,k=11,l=12,m=13,n=14,o=15,p=16,q=17,r=18,s=19,t=20,u=21,v=22,w=23,x=24,​y=25,z=26)

R;Z = R - Z = 18 - 26 = 8 = H
u;z = u - z = 21 - 26 = 5 = e
n;z = n - z = 14 - 26 = 12 = l
n;z = n - z = 14 - 26 = 12 = l
k;z = k - z = 11 - 26 = 15 = o

Input: Hello
(If you want to know how the letters are generated, just ask and i'll be happy to explain the process :D)



*SOLVED BY "LaViolador"* Challenge #3 - Difficulty Easy/Medium - $5 Prize! SOLVED BY "LaViolador"*
Spoiler (Click to View)

Welcome to challenge #3 of this contest!
This challenge is the middle difficulty of the 5, so it's a bit tricky!
Completing this challenge will earn you $5 according with the rules!
The only rules for this challenge are the rules for the contest, which can be located above!
With all this said, here is your challenge! 😈

Figure out what the input/message is of the following Cipher-Text:

Cipher-Text: R fkglly pchy sll dxx eijoy twene xpphldl

Here are 3 input/output examples of the encoding algorithm used for this challenge:

Example 1:
Input: Hackforums
Output: HkcaForuwi

Example 2:
Input: encode
Output: khuidk

Example 3:
Input: Peace
Output: Fefre

HINT: *Not Given Yet

Good luck on this challenge and remember to follow the format when you're making your post/entry! 👍



How the algorithm works:
Spoiler (Click to View)
Input: Hello

Step1: Input Length (abc = 3)

Hello = 5

Info:
Letter chart: A chart of the letters of the alphabet according with the input length

Step2: Letter chart and Input length
(Input Length: abc = 3 |
Letter Chart for 3:

Code

abc
def
ghi
jkl
mno
pqr
stu
vwx
yz

Hello = 5
Letter Chart for 5:

Code

abcde
fghij
klmno
pqrst
uvwxy
z

More Info: Input and Letter Chart
(input length: abc = 3
letter chart for 3:

Code

abc
def
ghi
jkl
mno
pqr
stu
vwx
yz

Input = abc
Notice where the letters are in their letter chart "a", "b","c")

Step3: Working with the Input and Letter Chart
(Go down the letter chart of how many the input length is. | a = d, b = h, c = l)

Hello = 5
Letter Chart for 5:

Code

abcde
fghij
klmno
pqrst
uvwxy
z

Hello = H down 5 = H, e down 5 = , l down 5 = l, l down 5 = l, o down 5 = o

Output: Hello

Hello is a bad example not because of the words used, but because of how many letters it contains, overall this algorithm is defiantly not the best haha.


*SOLVED BY "deimoo92"* Challenge #4 - Difficulty Medium - $8 Prize! *SOLVED BY "deimoo92"*
Spoiler (Click to View)

Welcome to challenge #4 of this contest!
This challenge is the 2nd hardest of the 5, so take your time!
Completing this challenge will earn you $8 according with the rules!
The only rules for this challenge are the rules for the contest, which can be located above!
With all this said, here is your challenge! 😈

Figure out what the input/message is of the following Cipher-Text:

Cipher-Text: Ribx jvualza ampp lezi hommkx vxofky

Here are 3 input/output examples of the encoding algorithm used for this challenge:

Example 1:
Input: Hackforums
Output: RkmuPybewc

Example 2:
Input: encode
Output: ktiujk

Example 3:
Input: Peace
Output: Ujfhj

HINT: Not Given Yet

Good luck on this challenge and remember to follow the format when you're making your post/entry! 👍



How the algorithm works:
Spoiler (Click to View)
Input: Hello

Step1: input length (abc = 3)

Hello = 5

Step2: Letter to their Numbers (abc = 1,2,3)
( a=1, b=2, c=3, d=4, e=5,f=6,g=7,h=8,i=9,j=10,k=11,l=12,m=13,n=14,o=15,p=16,q=17,r=18,s=19,t=20,u=21,v=22,w=23,x=24,​y=25,z=26)

Hello = 8,5,12,12,15

Step3: Add input length to each character's number (abc = 3 | abc= 1,2,3 | 3+1, 3+2, 3+3 = 4, 5, 6)

8,5,12,12,15 = 8+5,5+5,12+5,12+5,15+5 = 13,10,17,17,20

Step4: Numbers to their Letters (1,2,3 = abc)
(If numbers exceed 26, loop around to the next character. 1 = a, 2 = b, 3 = c... ect 25 = y, 26 = z, 27 = a, 28 = b...ect 52 = z, 53 = a... ect)

13,10,17,17,20 = Mjqqt

Output: Mjqqt


*SOLVED BY "LsDefect"* Challenge #5 - Difficulty Hard - $15 Prize! *SOLVED BY "LsDefect"*
Spoiler (Click to View)

Welcome to challenge #5 of this contest!
This challenge is the hardest of the 5, so I suggest you to take your time & pay close attention on this one!
Completing this challenge will earn you $15 according with the rules!
The only rules for this challenge are the rules for the contest, which can be located above!
With all this said, here is your challenge! 😈

Figure out what the input/message is of the following Cipher-Text:

Cipher-Text: Mwos sto aat Q ay irwwll mqpg wea otqn egjesyc mvjc

Here are 3 input/output examples of the encoding algorithm used for this challenge:

Example 1:
Input: Hackforums
Output: OtesAxuxey

Example 2:
Input: encode
Output: iwrasf

Example 3:
Input: Peace
Output: Etweg

HINT:

* UPDATE: After analyzing challenge #5 some more, i have realized their are two ways to go about encoding it (For Precision or Obscurity). For this challenge, it was for obscurity... meaning it's a bit more tricky! Nevertheless, it is still solvable/decode-able! :D

To encode & decode Challenge #5 you will need a chart/map or some other way of doing it that im unaware of haha.

Of this chart/map, it is a variation of Vigenère Cipher... you will need to just strip off the top row & the left column :]

Now i also said it had a twist to it (this is encoding, not encryption, meaning no passwords but i guess since it involves using the Vigenère Cipher, you can think of the input as it's own password. ;)

Depending on how these go will determine if i'll release another hint. :D

Good luck to all! :D *

Good luck on this challenge and remember to follow the format when you're making your post/entry! 👍



How the algorithm works:
Spoiler (Click to View)
Not enough room to post it on the thread, so i posted it on PasteBin. Enjoy! haha
http://pastebin.com/CN5dsreZ


Hope you all enjoy these contests! Good luck to all of you on this one & let the best crackers win! 🎉
(next contest will have way bigger $prizes$! 🤗👍)

[phat808]

Challenge 1
Input: contemt my to welcome (guess/attempt #1)

[pym0l]

Challenge 1
Input: Welcome to my contest (guess/attempt #1)

[deimoo92]

Challenge 2
Input: Hopefully the challengds are not too difficult (guess/attempt #1)

(Did you made a mistake on the "challenges" word during encryption ?)

EDIT :

Challenge 4
Input: Next contest will have bigger prizes (guess/attempt #1)

[TheDubWubCub]

Challenge 1
Input: contemt my to welcome (guess/attempt #1)

Nice try but not exactly.

Challenge 1
Input: Welcome to my contest (guess/attempt #1)

Good job! I'll PM you details on getting your prize now! :D

Challenge 2
Input: Hopefully the challengds are not too difficult (guess/attempt #1)

(Did you made a mistake on the "challenges" word during encryption ?)

EDIT :

Challenge 4
Input: Next contest will have bigger prizes (guess/attempt #1)

For Challenge 2, i see that i made that small little error, you are correct!

For challenge 4, good job! I will PM you details on how to get your prizes now! :D

When assigning the diffuculty ratings for each challenge, it was hard for me to choose between 3 and 4, looks like 3 is harder than 4 :D

Remaining challenges: #3 and #5! Good luck! 🤗

[LaViolador]

Challenge 3
Input: I really hope you all enjoy these puzzles. (guess/attempt #1)

I think :)

[deimoo92]

Thank you so much, payement done !
Really good contest !

[TheDubWubCub]

Challenge 3
Input: I really hope you all enjoy these puzzles. (guess/attempt #1)

I think :)

Good job & congrats! I have already PM'd you & sent the money! :D

Thank you so much, payement done !
Really good contest !

Your welcome & thank you very much for participating! :D

Good luck to everyone on Challenge #5! It is significantly more difficult than the others! :D

[glassp]

This is hard. I have been trying number 5 for a while. Any hints? I might be using too advanced methods ;c

[vitafortis]

This is hard. I have been trying number 5 for a while. Any hints? I might be using too advanced methods ;c

That makes two of us. I have also been trying random guess work and feel I have it half solved :(

[glassp]

That makes two of us. I have also been trying random guess work and feel I have it half solved :(

Want to work on it together over skype or something? :D

[Sexygoco]

I'm going to smack my head off my desk, I tried for over an hour to decode number 5, It's just not happening. No money for me. :(

This is truly a great idea for a contest OP well done!

[vitafortis]

Want to work on it together over skype or something? :D

I suppose. Add me, my skype is "vitafortis"

[glassp]

When I get l33t, I am holding a ton of contests like this. I love it.

[vitafortis]

OP, I have a question. Am I allowed to brute force #5?