| Cryptography Challenges |
| # |
Description |
Winners |
Points |
| 4919 |
Awarded |
Prize |
| 65 |
Yuri's Cellular Automata |
3 |
1,350 |
450 |
| 64 |
Fermat's Square Fractal |
24 |
9,600 |
400 |
| 63 |
Richard's Geometric Glyphs |
44 |
8,800 |
200 |
| 62 |
Isabella's Amazing Maze |
26 |
10,400 |
400 |
| 61 |
Billions and Billions of Buckets |
145 |
43,500 |
300 |
| 60 |
Alexander's Letter Scramble |
77 |
7,700 |
100 |
| 59 |
Polybius Comes Knocking |
6 |
2,400 |
400 |
| 58 |
Mayan Knotted Sphere |
52 |
15,600 |
300 |
| 57 |
The Infrequent Mr. Watson |
71 |
21,300 |
300 |
| 56 |
Felicia's Scrabble Hash |
420 |
84,350 |
150 |
| 55 |
Chinese Space Time |
3 |
1,500 |
500 |
| 54 |
Sterling's Robot Speech |
4 |
2,800 |
700 |
| 53 |
Cooper's Crazy Glyphs |
46 |
4,600 |
100 |
| 52 |
The Mersenne-Foster Cipher |
14 |
7,000 |
500 |
| 51 |
Ra's Happy Curse |
1,004 |
50,200 |
50 |
| 50 |
Debra's Electrophoresis Pieces |
11 |
4,400 |
400 |
| 49 |
Sheep's Pictographic Melody |
10 |
4,000 |
400 |
| 48 |
Smith's Christmas Card |
36 |
10,800 |
300 |
| 47 |
Every Bit As Savage |
18 |
5,400 |
300 |
| 46 |
Johnny's Chair Can Spin |
39 |
1,950 |
50 |
| 45 |
Rubik's Cube Of Joy |
24 |
1,200 |
50 |
| 44 |
Judge, Jury, and Executioner |
7 |
3,500 |
500 |
| 43 |
Echo's In Perlin Space |
121 |
6,050 |
50 |
| 42 |
Sagan's Son's Security Signal |
5 |
3,000 |
600 |
| 41 |
Tammet's Particle Accelerator |
315 |
63,000 |
200 |
| 40 |
Hannigan's Space Adventure |
29 |
1,450 |
50 |
| 39 |
Stephenson's Substitution Cipher |
76 |
22,800 |
300 |
| 38 |
Kricfalusi's Kerfuffle |
34 |
6,000 |
0 |
| 37 |
Busey's Stream Cipher |
66 |
13,200 |
200 |
| 35 |
Heinlein's Trinity Cipher |
22 |
4,400 |
200 |
| 34 |
Tiny Piano Panoply |
7 |
350 |
50 |
| 33 |
Mansel's Black Box |
28 |
8,400 |
300 |
| 32 |
Penny For Your Scrubs |
23 |
4,600 |
200 |
| 31 |
Tickle Thicke's Thick Pink Pickle |
12 |
4,800 |
400 |
| 30 |
Daneel's Celestial Cipher |
13 |
7,800 |
600 |
| 29 |
Multivac's Quantum Correlation |
104 |
20,800 |
200 |
| 28 |
GendouBot Strikes Again |
21 |
10,500 |
500 |
| 27 |
Movie Madness |
35 |
3,500 |
100 |
| 26 |
Baltar's Wet Dream |
51 |
10,200 |
200 |
| 25 |
Zip File Security |
77 |
30,800 |
400 |
| 23 |
Concentric Circle Cipher |
93 |
18,600 |
200 |
| 22 |
Hip, Skip, and Jump |
51 |
15,300 |
300 |
| 21 |
Fielding's Noisy Surprise |
169 |
8,450 |
50 |
| 20 |
Bouncing Balls |
28 |
16,800 |
600 |
| 19 |
Cryptography Challenge #19 |
6 |
2,400 |
400 |
| 18 |
Busy As A Bee |
13 |
3,900 |
300 |
| 17 |
First Contact |
6 |
3,600 |
600 |
| 16 |
Feynman's Steganographic Cipher |
20 |
12,000 |
600 |
| 15 |
The Blinking Legend |
8 |
4,000 |
500 |
| 14 |
Euclid's Coconut Head |
30 |
21,000 |
700 |
| 13 |
The Morse Witch Project |
35 |
3,500 |
100 |
| 12 |
Japanese Treasure Hunt |
74 |
7,400 |
100 |
| 11 |
Handel's Hexadecimal Handle |
25 |
1,250 |
50 |
| 10 |
Hunt And Pectorals |
31 |
6,200 |
200 |
| 9 |
Einstein's Theory of Streamability |
31 |
15,500 |
500 |
| 8 |
Prime Factor Hangman |
485 |
24,250 |
50 |
| 7 |
Poppin' Polka Cipher |
17 |
11,600 |
700 |
| 6 |
Counting with Yazelbons |
136 |
40,800 |
300 |
| 5 |
Beethoven's Cipher |
35 |
28,000 |
800 |
| 4 |
Dmitri's Substitution Cipher |
447 |
44,700 |
100 |
| 2 |
Gibson Steganography |
18 |
11,200 |
700 |
| 1 |
Matryoshka Challenge |
37 |
33,300 |
900 |