當您遠離純隨機加密文字時,某些種類的攻擊會變得較不那麼牽強。例如,攻擊者可以想像性地分析決定性加密的加密文字,並判斷純文字字串 Alice 一律解析為加密文字 YjNkY2JlNjU5M2JkNjk4MGJiNWE2NGQ5NzI5MzU1OTcNCg==。在有充足時間竊密的情況下,攻擊者可以建立純文字值到加密文字值的字典來破解加密。
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