相对公钥密码算法，接收方可以在不知道明文的情况下，直接对密文执行融合，节省了因解密带来的能量消耗。
Corresponding to public key cryptographic algorithm, it can save energy consumption because the receiver can aggregate cryptograph directly instead of obtaining explicit terms.
同时对这种加密算法的明文密码空间、密文密码空间和加密强度等作了初步的分析。
Therefore the decryption time and difficulty can be greatly increased, and the cipher can be protected from decryption in this algorithm.
提出两个抗选择密文攻击的门限密码系统。
Two threshold cryptosystems secure against chosen ciphertext attacks are proposed.
抗选择密文攻击公钥密码体制是安全性很高的密码体制，它是设计抗主动攻击的协议非常有用的工具。
The public key cryptosystem secure against chosen ciphertext attacks is a very strong secure cryptosystem and is a useful primitive for designing protocols that resisting active adversary.
通过使用动态密码对明文的修补，使其密文长度与明文长度相等。
The ameliorated algorithm ensures the length of cipher text is equal to the length of plain text by patching it with dynamic cipher.
同时对这种加密算法的明文密码空间、密文密码空间和加密强度等作了初步的分析。
The paper also tentatively discusses several related encryption algorithms to improve the security and analyzes the plaintext key space, ciphertext key space and encryption strength.
为了保证密文数据在不解密的情况下能够被检索出来，日期、数字类型的数据需要按照一定的规则转换成字符，并且加密使用的分组密码算法需要进行一些改造。
In order to enable query on ciphertext, date and numeric typed data must be transformed according some rules, and the grouping cipher arithmetic must be changed a little.
分发的子密钥通过椭圆曲线密码进行了加密，使得受托人掌握的子密钥是加密后的密文形式，增强了安全性；
The shared key distributed by the dealer is encrypted based on ECC to enhance the security. Meanwhile the length of the key of ECC is much shorter than that of RSA cryptography.
对分组密码的工作模式进行了攻击，结果表明如果攻击者能询问电码本（ECB）问答器，则很容易攻破明密文分组连接模式（PCBC）；
We show that when the attacker has access to an electronic codebook(ECB)oracle, the plaintext cipher block chaining mode(PCBC) can be easily attacked;
对分组密码的工作模式进行了攻击，结果表明如果攻击者能询问电码本（ECB）问答器，则很容易攻破明密文分组连接模式（PCBC）；
We show that when the attacker has access to an electronic codebook(ECB)oracle, the plaintext cipher block chaining mode(PCBC) can be easily attacked;
应用推荐