PowerPoint 簡報

Password Authentication

1.Secure Channel

　 password : plaintext

2.Nonsecure Channel

　using encryption technique to make “Challenge-Response”

EXAMPLE：

0 2 7 3 6 3 9 2

　Challenge 3 1 5 4 5 6 7 1

9 4 0 7 1 1 5 3

6 8 2 8 9 0 3 6

Response

　 * Rule : in each column input the number which the password has or just input any

other number in this number you like.

6 4 5 4 9 6 3 3

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