认证加密模型JAMBU的新分析

根据JAMBU模型的结构特点——相关数据和明文可以相互转化，利用伪造攻击等基本思想提出了“随机数重复利用”的分析方法。结果表明，该分析所需数据复杂度为$2^{\frac{n}{2}}$，时间复杂度为$4\times 2^{\frac{n}{2}}$。与已有分析结果相比，该分析数据复杂度更低。

New cryptanalysis of the authenticated cipher model JAMBU

Based on the characteristic of JAMBU,a forgery attack by using the principle,where the associated data can be transformed into the plaintext was proposed.It is shown that the attack requires a data complexity of about $2^{\frac{n}{2}}$chosen plaintext,and a time complexity of about $4\times 2^{\frac{n}{2}}$encryptions.Compared with the previous attack,this attack is more favorable.