RSA Laboratories - The RSA Laboratories Secret-Key Contests

The following thirteen contests were launched on 28 January 1997 at 9 am PST. At that time, the ciphertext and the random IV used for the encryption in each contest were made available at this page. For a list of the prizes and the current status of each contest see "Status and Prizes".

Contest identifier: DES
Cipher: DES
Start of contest: 28 January 1997, 9 am PST
State of contest: finished
IV: 99 e9 7c bf 4f 7a 6e 8f
Hexadecimal ciphertext:

79 45 81 c0 a0 6e 40 a2 0b e3 33 c6 5c 93 b7 22
aa c2 61 27 ff 72 ac c6 03 68 60 2b 43 99 3c 31
9f 36 e6 ae 82 0c 5d 3f a2 3b b4 91 e5 ef ee a3
b9 92 78 d4 af 0f 66 aa f5 17 e8 64 08 88 82 8d
67 ba fe bf 78 95 60 95 31 6a e2 98 78 1c 6a f7

Contest identifier: RC5-32/12/5
Cipher: RC5-32/12/5 (RC5 with 32-bit wordsize, 12 rounds, and 5*8=40-bit key)
Start of contest: 28 January 1997, 9 am PST
State of contest: finished
IV: 8a 16 2f 69 e8 37 98 bc
Hexadecimal ciphertext:

12 35 13 64 78 d3 da 08 d9 15 ed 20 89 30 5f 50
68 5c 6c b4 bf 5b 00 38 ff 44 4e d9 d4 9b 46 16
fb 12 92 62 9b d4 7f 1a 8d 48 fe b6 63 d1 d4 c2
eb 19 0d 86 3f f4 43 75 9a 58 06 2c 8b a5 9e 6a
33 30 c3 3e a8 ab 24 25

Contest identifier: RC5-32/12/6
Cipher: RC5-32/12/6 (RC5 with 32-bit wordsize, 12 rounds, and 6*8=48-bit key)
Start of contest: 28 January 1997, 9 am PST
State of contest: finished
IV: cf 4c df 7c 08 36 ea cc
Hexadecimal ciphertext:

46 de b3 1b 18 5d 4b e6 68 ef 9e 4c 72 b3 a1 44
06 fa fb f4 07 11 25 6b 41 e9 b5 8f 1a 32 b8 5a
d5 1c b6 37 e7 61 02 e9 5b 00 66 33 1c e7 64 61
12 07 d3 b6 00 56 81 8c 42 f0 51 a2 f6 45 7e d5
f6 13 2a e1 eb fd 8a 90

Contest identifier: RC5-32/12/7
Cipher: RC5-32/12/7 (RC5 with 32-bit wordsize, 12 rounds, and 7*8=56-bit key)
Start of contest: 28 January 1997, 9 am PST
State of contest: finished
IV: 7b 32 f0 8a e6 17 de 8c
Hexadecimal ciphertext:

82 d3 4e a7 b3 24 86 0b c6 d8 61 5c e9 f9 e4 79
88 5c 98 f1 d2 92 4c 59 ee 47 51 31 01 3e a8 ab
d6 f0 4d c8 19 97 af 01 5e af f8 3f cd 61 b3 c2
66 89 7c 82 09 87 4d fb 07 f2 56 03 8d d5 1b 01
ca e3 41 c2 8d d7 18 1d

Contest identifier: RC5-32/12/8
Cipher: RC5-32/12/8 (RC5 with 32-bit wordsize, 12 rounds, and 8*8=64-bit key)
Start of contest: 28 January 1997, 9 am PST
State of contest: finished
IV: 79 ce d5 d5 50 75 ea fc
Hexadecimal ciphertext:

bf 55 01 55 dc 26 f2 4b 26 e4 85 4d f9 0a d6 79
66 93 ab 92 3c 72 f1 37 c8 b7 0d 1f 60 11 0c 92
ae 2e cd fd 70 d3 fd 17 df b0 42 12 b9 7d cf 22
18 6b a7 15 ce 2c 84 bf ce 0d d0 4d 00 6b e1 46

Contest identifier: RC5-32/12/9
Cipher: RC5-32/12/9 (RC5 with 32-bit wordsize, 12 rounds, and 9*8=72-bit key)
Start of contest: 28 January 1997, 9 am PST
State of contest: ongoing
IV: 41 d5 97 4c 00 7a f5 f6
Hexadecimal ciphertext:

e7 af fc be 5f 74 ec a6 11 a2 1f a8 8a 0a a1 76
dd 8e 01 d3 2b 31 a8 df 60 26 4f b0 16 ed 2c 71
89 fb 01 db ac 0f af b5 21 a8 d6 5e a6 0f 54 48
14 f5 06 1e 1f 21 8b 36

Contest identifier: RC5-32/12/10
Cipher: RC5-32/12/10 (RC5 with 32-bit wordsize, 12 rounds, and 10*8=80-bit key)
Start of contest: 28 January 1997, 9 am PST
State of contest: ongoing
IV: 0a 36 85 4c 02 61 eb 7e
Hexadecimal ciphertext:

3b d4 23 42 2e 25 33 85 ee 72 ff 80 61 66 a2 42
bd 88 0a 9a f7 8e 8c ed 69 bd 29 b3 e4 da 25 7a
e3 70 9a 20 4e d5 f3 fb 24 fb 7e 6a 8c 80 e6 cf
86 f7 9f 08 e1 b1 05 4e

Contest identifier: RC5-32/12/11
Cipher: RC5-32/12/11 (RC5 with 32-bit wordsize, 12 rounds, and 11*8=88-bit key)
Start of contest: 28 January 1997, 9 am PST
State of contest: ongoing
IV: 3f 34 cc 3e 81 35 b6 7e
Hexadecimal ciphertext:

1b ae 57 d0 f6 31 45 ee 20 ea 72 76 ff d0 f2 3d
29 cf 74 02 a0 19 5e 5a 70 2e 50 e9 22 1d 07 3b
1a 63 8b 81 5c 70 da 21 5b ef 46 13 e0 a1 dd 1f
70 0f 16 59 bf ca 89 7e 24 20 5f 17 90 34 03 08
85 6b 98 d9 dc 18 69 a3

Contest identifier: RC5-32/12/12
Cipher: RC5-32/12/12 (RC5 with 32-bit wordsize, 12 rounds, and 12*8=96-bit key)
Start of contest: 28 January 1997, 9 am PST
State of contest: ongoing
IV: 58 e1 6b 49 ea 01 91 c8
Hexadecimal ciphertext:

88 4a 56 09 29 f4 89 67 d3 3c 01 0d 43 cb 4b ca
1c ca 7e 8a 13 96 1f 86 0d 0f ef 34 11 bf 92 9a
e4 ad e9 f9 6f 5d bf 85 4a 6c 91 2d f0 eb 85 29
6f ed 92 93 2b 4e bf f0

Contest identifier: RC5-32/12/13
Cipher: RC5-32/12/13 (RC5 with 32-bit wordsize, 12 rounds, and 13*8=104-bit key)
Start of contest: 28 January 1997, 9 am PST
State of contest: ongoing
IV: a1 81 0b c2 24 16 75 56
Hexadecimal ciphertext:

73 fe 78 b6 10 ee f9 2d 00 f5 ab 22 1d 5d 32 95
b4 c0 14 5b 7a 79 e4 50 a3 67 34 bd 08 26 4d c8
90 8a 83 41 66 89 2b d6 cb b4 73 6c 22 88 96 bf
7e 71 5c 24 93 2a d4 16 4d d9 0b 07 cf 8b c8 1a
1e ad aa 10 6c 0e a1 ba

Contest identifier: RC5-32/12/14
Cipher: RC5-32/12/14 (RC5 with 32-bit wordsize, 12 rounds, and 14*8=112-bit key)
Start of contest: 28 January 1997, 9 am PST
State of contest: ongoing
IV: 7a 4a ce 03 47 81 4f 23
Hexadecimal ciphertext:

af d2 8f 1f 43 b1 5b 3f f3 1f d3 c7 77 b0 1c 13
ca a1 f6 82 58 4b a0 48 58 f8 57 f2 4f 10 58 1b
2a 78 1b 38 5b b9 57 89 12 2c 00 5e 49 b8 69 18
01 26 b2 4a 85 dc f5 77 f1 4a f1 4c 9c 7e 02 b8
63 17 75 2d 58 06 03 3a ed bb 0b a5 07 93 68 8f

Contest identifier: RC5-32/12/15
Cipher: RC5-32/12/15 (RC5 with 32-bit wordsize, 12 rounds, and 15*8=120-bit key)
Start of contest: 28 January 1997, 9 am PST
State of contest: ongoing
IV: bb 7e 6b 98 3e 4a a2 0c
Hexadecimal ciphertext:

68 b4 b3 5a 1c 8f 8c ad 43 e8 e8 e1 cb 44 fe 0a
4a fa 99 c5 16 ef f3 f4 61 1e 50 ec 01 f8 5a 00
6c 33 20 0e e3 98 5d fb 6f 9f 06 bd 21 c1 35 9e
3a 12 5f 69 9a 84 05 ce b0 24 bb c5 83 3a 72 c8

Contest identifier: RC5-32/12/16
Cipher: RC5-32/12/16 (RC5 with 32-bit wordsize, 12 rounds, and 16*8=128-bit key)
Start of contest: 28 January 1997, 9 am PST
State of contest: ongoing
IV: a7 8b 00 e8 15 e6 2f 5d
Hexadecimal ciphertext:

d9 3b 27 72 11 8a 65 cb ef 5b 06 74 63 76 22 16
84 f9 ec 21 56 3b 1c 1c 02 e1 70 10 50 d1 71 00
06 aa bf c1 38 e1 f1 f8 2d 63 57 bb 24 a9 7d 5d

Crypto FAQ RSA Algorithm Cryptographic Challenges The RSA Factoring Challenge About CryptoBytes The RSA Laboratories Secret-Key Challenge DES Challenge III CryptoBytes Technical Newsletter Technical Notes and Reports	Home: Historical: Cryptographic Challenges: The RSA Laboratories Secret-Key Challenge: Contests The RSA Laboratories Secret-Key Contests The following thirteen contests were launched on 28 January 1997 at 9 am PST. At that time, the ciphertext and the random IV used for the encryption in each contest were made available at this page. For a list of the prizes and the current status of each contest see "Status and Prizes". Contest identifier: DES Cipher: DES Start of contest: 28 January 1997, 9 am PST State of contest: finished IV: 99 e9 7c bf 4f 7a 6e 8f Hexadecimal ciphertext: 79 45 81 c0 a0 6e 40 a2 0b e3 33 c6 5c 93 b7 22 aa c2 61 27 ff 72 ac c6 03 68 60 2b 43 99 3c 31 9f 36 e6 ae 82 0c 5d 3f a2 3b b4 91 e5 ef ee a3 b9 92 78 d4 af 0f 66 aa f5 17 e8 64 08 88 82 8d 67 ba fe bf 78 95 60 95 31 6a e2 98 78 1c 6a f7 Contest identifier: RC5-32/12/5 Cipher: RC5-32/12/5 (RC5 with 32-bit wordsize, 12 rounds, and 58=40-bit key) Start of contest: 28 January 1997, 9 am PST State of contest: finished* IV: 8a 16 2f 69 e8 37 98 bc Hexadecimal ciphertext: 12 35 13 64 78 d3 da 08 d9 15 ed 20 89 30 5f 50 68 5c 6c b4 bf 5b 00 38 ff 44 4e d9 d4 9b 46 16 fb 12 92 62 9b d4 7f 1a 8d 48 fe b6 63 d1 d4 c2 eb 19 0d 86 3f f4 43 75 9a 58 06 2c 8b a5 9e 6a 33 30 c3 3e a8 ab 24 25 Contest identifier: RC5-32/12/6 Cipher: RC5-32/12/6 (RC5 with 32-bit wordsize, 12 rounds, and 68=48-bit key) Start of contest: 28 January 1997, 9 am PST State of contest: finished* IV: cf 4c df 7c 08 36 ea cc Hexadecimal ciphertext: 46 de b3 1b 18 5d 4b e6 68 ef 9e 4c 72 b3 a1 44 06 fa fb f4 07 11 25 6b 41 e9 b5 8f 1a 32 b8 5a d5 1c b6 37 e7 61 02 e9 5b 00 66 33 1c e7 64 61 12 07 d3 b6 00 56 81 8c 42 f0 51 a2 f6 45 7e d5 f6 13 2a e1 eb fd 8a 90 Contest identifier: RC5-32/12/7 Cipher: RC5-32/12/7 (RC5 with 32-bit wordsize, 12 rounds, and 78=56-bit key) Start of contest: 28 January 1997, 9 am PST State of contest: finished* IV: 7b 32 f0 8a e6 17 de 8c Hexadecimal ciphertext: 82 d3 4e a7 b3 24 86 0b c6 d8 61 5c e9 f9 e4 79 88 5c 98 f1 d2 92 4c 59 ee 47 51 31 01 3e a8 ab d6 f0 4d c8 19 97 af 01 5e af f8 3f cd 61 b3 c2 66 89 7c 82 09 87 4d fb 07 f2 56 03 8d d5 1b 01 ca e3 41 c2 8d d7 18 1d Contest identifier: RC5-32/12/8 Cipher: RC5-32/12/8 (RC5 with 32-bit wordsize, 12 rounds, and 88=64-bit key) Start of contest: 28 January 1997, 9 am PST State of contest: finished* IV: 79 ce d5 d5 50 75 ea fc Hexadecimal ciphertext: bf 55 01 55 dc 26 f2 4b 26 e4 85 4d f9 0a d6 79 66 93 ab 92 3c 72 f1 37 c8 b7 0d 1f 60 11 0c 92 ae 2e cd fd 70 d3 fd 17 df b0 42 12 b9 7d cf 22 18 6b a7 15 ce 2c 84 bf ce 0d d0 4d 00 6b e1 46 Contest identifier: RC5-32/12/9 Cipher: RC5-32/12/9 (RC5 with 32-bit wordsize, 12 rounds, and 98=72-bit key) Start of contest: 28 January 1997, 9 am PST State of contest: ongoing IV: 41 d5 97 4c 00 7a f5 f6 Hexadecimal ciphertext: e7 af fc be 5f 74 ec a6 11 a2 1f a8 8a 0a a1 76 dd 8e 01 d3 2b 31 a8 df 60 26 4f b0 16 ed 2c 71 89 fb 01 db ac 0f af b5 21 a8 d6 5e a6 0f 54 48 14 f5 06 1e 1f 21 8b 36 Contest identifier: RC5-32/12/10 Cipher: RC5-32/12/10 (RC5 with 32-bit wordsize, 12 rounds, and 108=80-bit key) Start of contest: 28 January 1997, 9 am PST State of contest: ongoing IV: 0a 36 85 4c 02 61 eb 7e Hexadecimal ciphertext: 3b d4 23 42 2e 25 33 85 ee 72 ff 80 61 66 a2 42 bd 88 0a 9a f7 8e 8c ed 69 bd 29 b3 e4 da 25 7a e3 70 9a 20 4e d5 f3 fb 24 fb 7e 6a 8c 80 e6 cf 86 f7 9f 08 e1 b1 05 4e Contest identifier: RC5-32/12/11 Cipher: RC5-32/12/11 (RC5 with 32-bit wordsize, 12 rounds, and 118=88-bit key) Start of contest: 28 January 1997, 9 am PST State of contest: ongoing IV: 3f 34 cc 3e 81 35 b6 7e Hexadecimal ciphertext: 1b ae 57 d0 f6 31 45 ee 20 ea 72 76 ff d0 f2 3d 29 cf 74 02 a0 19 5e 5a 70 2e 50 e9 22 1d 07 3b 1a 63 8b 81 5c 70 da 21 5b ef 46 13 e0 a1 dd 1f 70 0f 16 59 bf ca 89 7e 24 20 5f 17 90 34 03 08 85 6b 98 d9 dc 18 69 a3 Contest identifier: RC5-32/12/12 Cipher: RC5-32/12/12 (RC5 with 32-bit wordsize, 12 rounds, and 128=96-bit key) Start of contest: 28 January 1997, 9 am PST State of contest: ongoing IV: 58 e1 6b 49 ea 01 91 c8 Hexadecimal ciphertext: 88 4a 56 09 29 f4 89 67 d3 3c 01 0d 43 cb 4b ca 1c ca 7e 8a 13 96 1f 86 0d 0f ef 34 11 bf 92 9a e4 ad e9 f9 6f 5d bf 85 4a 6c 91 2d f0 eb 85 29 6f ed 92 93 2b 4e bf f0 Contest identifier: RC5-32/12/13 Cipher: RC5-32/12/13 (RC5 with 32-bit wordsize, 12 rounds, and 138=104-bit key) Start of contest: 28 January 1997, 9 am PST State of contest: ongoing IV: a1 81 0b c2 24 16 75 56 Hexadecimal ciphertext: 73 fe 78 b6 10 ee f9 2d 00 f5 ab 22 1d 5d 32 95 b4 c0 14 5b 7a 79 e4 50 a3 67 34 bd 08 26 4d c8 90 8a 83 41 66 89 2b d6 cb b4 73 6c 22 88 96 bf 7e 71 5c 24 93 2a d4 16 4d d9 0b 07 cf 8b c8 1a 1e ad aa 10 6c 0e a1 ba Contest identifier: RC5-32/12/14 Cipher: RC5-32/12/14 (RC5 with 32-bit wordsize, 12 rounds, and 148=112-bit key) Start of contest: 28 January 1997, 9 am PST State of contest: ongoing IV: 7a 4a ce 03 47 81 4f 23 Hexadecimal ciphertext: af d2 8f 1f 43 b1 5b 3f f3 1f d3 c7 77 b0 1c 13 ca a1 f6 82 58 4b a0 48 58 f8 57 f2 4f 10 58 1b 2a 78 1b 38 5b b9 57 89 12 2c 00 5e 49 b8 69 18 01 26 b2 4a 85 dc f5 77 f1 4a f1 4c 9c 7e 02 b8 63 17 75 2d 58 06 03 3a ed bb 0b a5 07 93 68 8f Contest identifier: RC5-32/12/15 Cipher: RC5-32/12/15 (RC5 with 32-bit wordsize, 12 rounds, and 158=120-bit key) Start of contest: 28 January 1997, 9 am PST State of contest: ongoing IV: bb 7e 6b 98 3e 4a a2 0c Hexadecimal ciphertext: 68 b4 b3 5a 1c 8f 8c ad 43 e8 e8 e1 cb 44 fe 0a 4a fa 99 c5 16 ef f3 f4 61 1e 50 ec 01 f8 5a 00 6c 33 20 0e e3 98 5d fb 6f 9f 06 bd 21 c1 35 9e 3a 12 5f 69 9a 84 05 ce b0 24 bb c5 83 3a 72 c8 Contest identifier: RC5-32/12/16 Cipher: RC5-32/12/16 (RC5 with 32-bit wordsize, 12 rounds, and 168=128-bit key) Start of contest: 28 January 1997, 9 am PST State of contest: ongoing IV: a7 8b 00 e8 15 e6 2f 5d Hexadecimal ciphertext: d9 3b 27 72 11 8a 65 cb ef 5b 06 74 63 76 22 16 84 f9 ec 21 56 3b 1c 1c 02 e1 70 10 50 d1 71 00 06 aa bf c1 38 e1 f1 f8 2d 63 57 bb 24 a9 7d 5d Top of Page
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