An enhaned NTRU cryptosystem eliminating decryption failures is proposed without using padding schemes and can resist the oracle model andchosen-ciphertext attacks. Because lattice reduction is the main threat to latt...An enhaned NTRU cryptosystem eliminating decryption failures is proposed without using padding schemes and can resist the oracle model andchosen-ciphertext attacks. Because lattice reduction is the main threat to lattice-based cryptosystems, lattice reductionalgorithms are analyzed to evaluate the security of this scheme. Furthermore, the new scheme remains the advantage of high efficiency of original NTRU.展开更多
随着云计算技术的发展和隐私保护的需要,同态加密域中的可逆数据隐藏已成为一项研究热点。加密域可逆数据隐藏方案大多利用了图像中像素点之间的相关性及冗余,适用范围受到了一定的限制。为了提高数据隐藏方案的适用性和嵌入容量,针对NT...随着云计算技术的发展和隐私保护的需要,同态加密域中的可逆数据隐藏已成为一项研究热点。加密域可逆数据隐藏方案大多利用了图像中像素点之间的相关性及冗余,适用范围受到了一定的限制。为了提高数据隐藏方案的适用性和嵌入容量,针对NTRU(Number Theory Research Unit)加密系统,提出了一种基于多项式划分的可逆数据隐藏方案。该方案将NTRU加密系统中的多项式空间划分为用于表示原始载体的明文段和用于隐藏数据的数据隐藏段,可用于在多种加密的数字媒体中隐藏数据。接收者可以从密文中直接提取一部分隐藏的数据,并能从解密得到的明文中提取另一部分隐藏的数据,并无损地恢复原始明文。在实验部分,分别以灰度图像和文本为例,对所提算法的可行性进行验证。实验结果表明,对于一个以8比特表示的明文值,其密文中最多可以隐藏N-8比特的数据,其中N为NTRU加密系统中的参数;当N取503时,在一个密文中最多可以隐藏495比特的数据,并能无损地恢复出原始明文值。与现有的同类方案相比,该方案所提的NTRU域可逆数据隐藏算法具有较高的嵌入容量和较强的适用性。展开更多
NTRU(Number Theory Research Unit)是一种新型的公钥密码体制,因其高效、快速和运算简单等特点,已得到越来越广泛的应用.其安全性建立在大维数格中的数学难题之上,为此,在研究NTRU算法和格理论的基础上,设计了一种建立在最近向量难题...NTRU(Number Theory Research Unit)是一种新型的公钥密码体制,因其高效、快速和运算简单等特点,已得到越来越广泛的应用.其安全性建立在大维数格中的数学难题之上,为此,在研究NTRU算法和格理论的基础上,设计了一种建立在最近向量难题上的数字签名方案.展开更多
The construetion and destruction of subliminal channel are important problems in the information hiding. The subliminal channel can send secret information without notice. Two subliminal-free methods named weak （str...The construetion and destruction of subliminal channel are important problems in the information hiding. The subliminal channel can send secret information without notice. Two subliminal-free methods named weak （strong） subliminal-free on public-key cryptosystem （PKC） are proposed in this paper using the combinatorial method. The first method can only free the subliminal information with any minor probability and the second can free all. Moreover, the ＂traitor problem＂ which is same as the model of the subliminal channel in PKC is given. Two subliminal channels are embedded in N-th degree truncated polynomial ring （NTRU） cryptosystem, and their subliminal-free methods are also be obtained by the action of surveillant.展开更多
NTRU is a lattice-based public key cryptosystem featuring reasonably short, easily created keys, high speed, and low memory requirements, seems viable for wireless network. This paper presents two optimized designs ba...NTRU is a lattice-based public key cryptosystem featuring reasonably short, easily created keys, high speed, and low memory requirements, seems viable for wireless network. This paper presents two optimized designs based on the enhanced NTRU algorithm. One is a light-weight and fast NTRU core, it performs encryption only. This work has a gate-count of 1175 gates and a power consumption of 1.51 μW. It can finish the whole encryption process in 1498 μs at 500 kHz. As such, it is perfect for wireless sensor network. Another high-speed NTRU core is capable of both encryption and decryption, with delays of 16,064 μs and 128,010 μs in encryption and decryption respectively. Moreover, it consists of 25,758 equivalent gates and has a total power consumption of 59.2 μW (it will be reduced greatly if low power methods were adopted). This core is recommended to be used in base stations or servers in wireless network.展开更多
文摘An enhaned NTRU cryptosystem eliminating decryption failures is proposed without using padding schemes and can resist the oracle model andchosen-ciphertext attacks. Because lattice reduction is the main threat to lattice-based cryptosystems, lattice reductionalgorithms are analyzed to evaluate the security of this scheme. Furthermore, the new scheme remains the advantage of high efficiency of original NTRU.
文摘随着云计算技术的发展和隐私保护的需要,同态加密域中的可逆数据隐藏已成为一项研究热点。加密域可逆数据隐藏方案大多利用了图像中像素点之间的相关性及冗余,适用范围受到了一定的限制。为了提高数据隐藏方案的适用性和嵌入容量,针对NTRU(Number Theory Research Unit)加密系统,提出了一种基于多项式划分的可逆数据隐藏方案。该方案将NTRU加密系统中的多项式空间划分为用于表示原始载体的明文段和用于隐藏数据的数据隐藏段,可用于在多种加密的数字媒体中隐藏数据。接收者可以从密文中直接提取一部分隐藏的数据,并能从解密得到的明文中提取另一部分隐藏的数据,并无损地恢复原始明文。在实验部分,分别以灰度图像和文本为例,对所提算法的可行性进行验证。实验结果表明,对于一个以8比特表示的明文值,其密文中最多可以隐藏N-8比特的数据,其中N为NTRU加密系统中的参数;当N取503时,在一个密文中最多可以隐藏495比特的数据,并能无损地恢复出原始明文值。与现有的同类方案相比,该方案所提的NTRU域可逆数据隐藏算法具有较高的嵌入容量和较强的适用性。
基金Supported by the National Natural Science Foun-dation of China (64073017) the Ph.D.Initial Science Foundationof Guangzhou University (100101) .
文摘The construetion and destruction of subliminal channel are important problems in the information hiding. The subliminal channel can send secret information without notice. Two subliminal-free methods named weak （strong） subliminal-free on public-key cryptosystem （PKC） are proposed in this paper using the combinatorial method. The first method can only free the subliminal information with any minor probability and the second can free all. Moreover, the ＂traitor problem＂ which is same as the model of the subliminal channel in PKC is given. Two subliminal channels are embedded in N-th degree truncated polynomial ring （NTRU） cryptosystem, and their subliminal-free methods are also be obtained by the action of surveillant.
文摘NTRU is a lattice-based public key cryptosystem featuring reasonably short, easily created keys, high speed, and low memory requirements, seems viable for wireless network. This paper presents two optimized designs based on the enhanced NTRU algorithm. One is a light-weight and fast NTRU core, it performs encryption only. This work has a gate-count of 1175 gates and a power consumption of 1.51 μW. It can finish the whole encryption process in 1498 μs at 500 kHz. As such, it is perfect for wireless sensor network. Another high-speed NTRU core is capable of both encryption and decryption, with delays of 16,064 μs and 128,010 μs in encryption and decryption respectively. Moreover, it consists of 25,758 equivalent gates and has a total power consumption of 59.2 μW (it will be reduced greatly if low power methods were adopted). This core is recommended to be used in base stations or servers in wireless network.
