Chen proposes a signature with message recovery which is called anauthenticated encryption scheme or simply a signcryption. In this short note, we show that Chen'ssignature scheme has some mistakes and propose thr...Chen proposes a signature with message recovery which is called anauthenticated encryption scheme or simply a signcryption. In this short note, we show that Chen'ssignature scheme has some mistakes and propose three modified versions.展开更多
To secure wireless communication, this paper provides a solution based on theabilities of the current mobile terminals. This paper also proposes a mechanism that can secure thecommunication between the current mobile ...To secure wireless communication, this paper provides a solution based on theabilities of the current mobile terminals. This paper also proposes a mechanism that can secure thecommunication between the current mobile terminals and the Internet Web Server. Yield to thecapabilities of the current mobile terminals, the public key techniques cannot be used now. But inthe future, the memory space and the computation ability of the mobile terminals will no longer beany puzzles, so certificate and Public Key Infrastructure (PKI) can be used to make wirelesscommunication security. This paper also proposes PKI architecture in the future mobile network.Finally this paper makes an assumption of the network's development and its secure issues.展开更多
In this paper, we prove that the 0/1 balance knapsack module 2~N isequivalent to the standard balance knapsack with its weight matrix being the upper triangle matrix,its number equals to 2^(N(N-1)/2)N(! ), and the ith...In this paper, we prove that the 0/1 balance knapsack module 2~N isequivalent to the standard balance knapsack with its weight matrix being the upper triangle matrix,its number equals to 2^(N(N-1)/2)N(! ), and the ith component' s nolinear complexity of the outputsequence being i.展开更多
A technology for combining digital watermarks with two-color bitmap image based on the threshold watermarking method is presented. Our technology doesn't add any thing to the digital media, but combines the waterm...A technology for combining digital watermarks with two-color bitmap image based on the threshold watermarking method is presented. Our technology doesn't add any thing to the digital media, but combines the watermarks in two-color bitmap image by looking for some characteristic values in the bitmap and uses the relationship between the watermarks and the characteristic values to prove the copyright protection. The choice of the characteristic values depends on the choice of a cryptographic key known by the owner of the bitmap. The benefit of using a cryptographic key is to combine the watermarks with the bitmap in a high secure way.展开更多
文摘Chen proposes a signature with message recovery which is called anauthenticated encryption scheme or simply a signcryption. In this short note, we show that Chen'ssignature scheme has some mistakes and propose three modified versions.
基金This work is supported by National Science Foundation of China (No.60372094).
文摘To secure wireless communication, this paper provides a solution based on theabilities of the current mobile terminals. This paper also proposes a mechanism that can secure thecommunication between the current mobile terminals and the Internet Web Server. Yield to thecapabilities of the current mobile terminals, the public key techniques cannot be used now. But inthe future, the memory space and the computation ability of the mobile terminals will no longer beany puzzles, so certificate and Public Key Infrastructure (PKI) can be used to make wirelesscommunication security. This paper also proposes PKI architecture in the future mobile network.Finally this paper makes an assumption of the network's development and its secure issues.
文摘In this paper, we prove that the 0/1 balance knapsack module 2~N isequivalent to the standard balance knapsack with its weight matrix being the upper triangle matrix,its number equals to 2^(N(N-1)/2)N(! ), and the ith component' s nolinear complexity of the outputsequence being i.
基金This project supported by the National Natural Science Foundation (No. 69802002,69882002, 69772035) and the National Project " 8
文摘A technology for combining digital watermarks with two-color bitmap image based on the threshold watermarking method is presented. Our technology doesn't add any thing to the digital media, but combines the watermarks in two-color bitmap image by looking for some characteristic values in the bitmap and uses the relationship between the watermarks and the characteristic values to prove the copyright protection. The choice of the characteristic values depends on the choice of a cryptographic key known by the owner of the bitmap. The benefit of using a cryptographic key is to combine the watermarks with the bitmap in a high secure way.
