A Vignère cipher of some sort? You might post this challenge to sci.crypt.

Mark.

"69" wrote in message ...
7 4 3 9 3 7 7 9 4 0 5 6 0 3 1 7 7 1 6 2 1 0 1 7 9 2 7 6 7 2 4 5 6 7
5 0 5 2 0 9 3 5 6 4 9 7 1 6 9 7 9 0 7 1 8 7 3 6 3 1 8 8 6 5 6 1 6 1
4 6 1 8 2 7 2 1 5 4 8 4 2 8 5 9 9 3 7 2 9 1 3 8 9 0 4 5 2 0 7 6 6 8
5 8 5 8 0 0 2 8 5 4 6 0 4 6 3 1 8 3 3 2 1 2 3 6 8 5 7 5 2 3 3 8 2 9
6 2 0 9 1 5 3 8 5 8 4 9 0 3 2 3 5 4 6 9 0 5 4 7 0 7 1 4 5 4 4 2 7 4
1 9 0 5 7 5 3 1 4 4 4 7 7 0 1 4 9 2 9 4 0 0 1 2 5 7 6 9 0 4 4 1 3 4
6 0 0 0 1 5 4 5 3 2 5 5 6 5 7 5 9 8 6 1 0 1 9 7 0 9 2 5 0 5 0 7 6 1
7 7 6 2 3 0 4 9 5 1 4 3 7 3 1 3 5 2 5 4 0 6 3 2 1 3 8 2 1 4 3 9 2 0
1 5 0 6 5 5 7 9 9 5 3 0 9 9 3 4 3 3 0 6 6 1 0 4 3 1 9 7 1 1 7 2 7 8
8 3 3 6 3 2 2 6 3 1 5 7 5 9 0 6 6 7 7 7 2 1 9 1 9 0 3 6 2 1 4 1 5 8
8 8 1 0 5 5 2 1 2 8 0 3 4 6 0 2 4 3 4 3 4 3 3 8 0 6 0 4 7 5 3 6 4 5
7 9 0 9 0 2 8 1 6 2 8 6 5 2 9 0 5 4 3 8 3 3 4 4 8 2 0 2 8 4 7 5 3 8
5 4 0 4 5 6 6 3 3 2 5 3 2 1 8 6 0 1 0 5 5 9 7 6 1 6 0 9 2 4 7 8 8 7
2 3 4 9 7 8 1 2 1 4 4 9 0 4 1 0 9 7 9 6 3 1 3 4 0 5 8 7 3 6 5 6 9 0
5 7 8 7 9 0 1 3 0 1 8 1 2 7 9 1 4 3 2 7 7 3 3 5 0 7 1 5 3 1 5 9 8 4
6 8 4 7 2 5 8 0 6 1 8 6 3 2 9 5 0 6 9 3 2 9 1 3 5 5 5 1 4 4 5 0 3 0
7 5 5 6 6 2 7 4 9 0 7 8 6 7 5 5 1 7 5 2 1 1 7 7 2 1 1 8 2 4 9 9 0 4
5 7 7 3 1 6 4 9 5 0 6 1 6 8 9 2 1 0 3 9 8 6 1 0 5 3 4 4 2 5 9 8 2 6
2 4 3 6 3 8 7 0 9 4 8 9 7 9 9 0 9 8 7 0 8 2 3 3 6 6 8 5 4 1 2 7 5 6
3 8 4 1 8 4 6 7 3 3 7 3 4 6 1 1 6 0 3 9 3 0 6 1 6 0 3 8 8 8 5 2 7 0