The US Data Security Public-Key Contest
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The following contests were launched on various dates. The first and the second are for beginners. For the fun of it, from the second contest on, certain amounts of award will be posted to show our appreciations to people who were interested in some serious cryptographic problems. We provide each contest a "chosen plaintext attack".
The first contest is on TTM 1.7, the second contest is on TTM 2.1 ($ 1,000
award), the third contest is on TTM 2.3 ($ 5,000 award). The following is a report of USDS Lab;
| TTM 2.3 | TTM 2.5 | |||
|---|---|---|---|---|
| background theory | abstract algebra | abstract algebra | ||
| public key | yes | yes | ||
| private key | yes | yes | ||
| signature | yes | yes | ||
| master key | yes | yes | ||
| error detection | yes. one error in 1064 | yes, one error in 1077 | ||
| speed | 207 kb/sec | 300 kb/sec | ||
| security | 3*2525MIPS-years | 3*1044MIPS-years | ||
| data expanding rate | 1.80 | 1.50 | ||
| TTM 2.8 | TTM 3.0 | |||
|---|---|---|---|---|
| background theory | abstract algebra | abstract algebra | ||
| public key | yes | yes | ||
| private key | yes | yes | ||
| signature | yes | yes | ||
| master key | yes | yes | ||
| error detection | yes. one error in 1082 | yes. one error in 1082 | ||
| speed | 658 kb/sec | 1,001 kb/sec | ||
| security | 3*1022MIPS-years | 3*1044MIPS-years | ||
| data expanding rate | 2.66 | 2.66 | ||
| TTM 4.0 | TTM 4.3 | |||
|---|---|---|---|---|
| background theory | abstract algebra | abstract algebra | ||
| public key | yes | yes | ||
| private key | yes | yes | ||
| signature | yes | yes | ||
| master key | yes | yes | ||
| error detection | yes. one error in 1080 | yes. one error in 1096 | ||
| speed(encode) | 10 Mb/sec | 18 Md/sec | ||
| speed(decode) | 42 Mb/sec | 50 Mb/sec | ||
| security | 3*1015MIPS-years | 3*1013MIPS-years | ||
| data expanding rate | 1.8 | 2.2 | ||
________________________________________________________
Learner's Contest I:
________________________________________________________
- Cipher: The public key TTM 1.7 (a "chosen plaintext attack" is provided)
- Start of contest: 31 July 1997, 11 am EST
- State of contest: ongoing
- Hexadecimal ciphertext:
6c d0 2f f8 43 33 1d 50 5d 63 21 49 e9 6d 40
9c 72 d6 ed e8 e5 ef 48 75 8f 97 a6 33 af
c7
2c b1 b8 b5 8b 78 7f 57 a9 b7 21 d6 f2 c2 de
8b 8f f6 54 fd b5 2d 29 c7 2c e4 b0 2c 99 4c
1c e0 f4 11 1e aa 72 e9 e5 10 6a e7 35 52 c9
04 c5 40 4c 74 d1 1d a5 58 96 3d 24 b4 56 b9
5b 24 c7 86 4c c2 81 2b 30 2f
________________________________________________________
Learner's Contest II:
________________________________________________________
- Cipher: The public key TTM 2.1
- Start of contest: 1 Oct. 1997, 3 pm EST
- Award of contest: $1,000 (one thousand dollars)
- State of contest: Stopped on May 3, 2000
- Hexadecimal ciphertext:
2b 87 38 cf 79 5a 60 25 97 a1 00 3d 47 67 b0
1a 99 18 0a 83 e1 fa 5c 6d fa b1 ff 58 c2 c2
4e 9e b8 0c ce 17 68 a5 16 d8 5a 14 fd 29 8f
81 81 39 93 12 62 8c 2a ed bf a0 31 39 fe 59
66 75 c2 a1 a3 37 ff 26 a7 96 6f a3 d6 d1 35
3a 3d 08 7c 0f 72 7a 1b 82 1c ca 81 26 73 da
4c c6 a8 e1 76 a9 88 e9 ba 93
________________________________________________________
Learner's Contest II (+):
______________________________________________
__________
- Cipher: The public key TTM 2.2 (a "chosen plaintext attack" is provided)
- Start of contest: 3 May 2000, 11 am EST
- State of contest: ongoing
- Award of contest: $1,000 (one thousa nd dollars)
- Hexadecimal ciphertext:
- ab 5d 13 d8 b8 dc fe 91 26 81 58 7f 65 17 9e
1d bf b7 ff 24 a6 97 5d ef 36 83 fb b7 d2 4d
07 66 ee e0 aa 72 e0 13 fe b3 59 09 a1 27 ce
e4 88 ed be ef d7 95 53 01 0d 02 45 07 d0 89
03 9f 90 b6 83 01 90 ef ff 72 1f f9 e7 c6 19
fd 3d 3a 4e 37 d3
______________________________________________ __________
Contest III:
________________________________________________________
- Cipher: The public key TTM 2.3 (a "chosen plaintext attack" is provided)(temperably disable by a hacker)
- Start of contest: 26 Nov. 1997, 11 am EST
- Award of contest: $5,000 (five thousand dollars)
- State of contest: ongoing
- Hexadecimal ciphertext:
5a 1a 94 2a 57 52 d1 1d 72 03 4f 95
c0 be 85 89 2d 10 25 09 f2 ed 2b 60
f4 12 73 8a cb 8a ec 0a e3 8e 98 6a
5b 5e 2d 4d e2 ed b7 b8 3e 4e 4b 68
0a 14 44 12 d5 16 9d 7b ce fd d7 7e
ab 42 7d 92 05 fb bb c4 a7 18 fe 99
________________________________________________________
Contact US Data Security Inc. at: phh@usdsi.com or webmaster@usdsi.com .
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