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发帖数: 337 | 1 ☆─────────────────────────────────────☆
nokwia (释放自己) 于 (Tue Oct 31 00:08:20 2006) 提到:
http://www.drizzle.com/~jpaint/google.html
Q: You need to check that your friend, Bob, has your correct phone number, b
ut you cannot ask him directly. You must write a the question on a card whic
h and give it to Eve who will take the card to Bob and return the answer to
you. What must you write on the card, besides the question, to ensure Bob ca
n encode the message so that Eve cannot read your phone nu |
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