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Hiding efficiency of traditional audio information hiding methods is always low since the sentience similarity cannot be guaranteed. A new audio information hiding method is proposed in this letter which can impose the insensitivity with the audio phase for auditory and realize the information hiding through specific algorithm in order to modify local phase within the auditory perception. The algorithm is to introduce the operation of “set 1” and “set 0” for every phase vectors, then the phases must lie on the boundary of a phase area after modified. If it lies on “1” boundary, it comes by set 1 operation. If it lies on “0” boundary, it comes by set 0 operation. The results show that, compared with the legacy method, the proposed method has better auditory similarity, larger information embedding capacity and lower code error rate. As a kind of blind detect method, it fits for application scenario without channel interference. [ABSTRACT FROM AUTHOR]

The design and implementation of fast algorithms related to Elliptic Curve Cryptography (ECC) over the field GF( p), such as modular addition, modular subtraction, point addition, point production, choice of embedding plaintext to a point, etc. are given. A practical software library has been produced which supports variable length implementation of the ECC-based ElGamal cryptosystem. More importantly, this scalable architecture of the design enables the ECC being used in restricted platforms as well as high-end servers based on Intel Pentium CPU. Applications such as electronic commerce security, data encryption communication, etc. are thus made possible for real time and effective ECC. [ABSTRACT FROM AUTHOR]