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In Eurocrypt 2009, Hofheinz and Kiltz proposed a practical chosen ciphertext (CCA) secure public key encryption under factoring assumption based on Rabin trapdoor one-way permutation. We show that when the modulus is special such that Z * N has semismooth order, the instantiation of Hofheinz-Kiltz 09 scheme (HK09) over a much smaller subgroup of quadratic residue group (Semi-smooth Subgroup) is CCA secure as long as this type of modulus is hard to be factored. Since the exponent domain of this instantiation is much smaller than the original one, the efficiency is substantially improved. In addition, we show how to construct a practical CCA secure encryption scheme from ElGamal trapdoor one-way function under factoring assumption. When instantiated over Semi-smooth Subgroup, this scheme has even better decryption efficiency than HK09 instantiation.

This study analyzes the linguistic patterns via both qualitative and quantitative data that manifest the underlying conceptual metaphor LIFE IS A SHOW in Chinese. It starts with an analysis of the PERFORMING ARTS frame as the source domain of the SHOW metaphor. The frame comprises three major aspects: PEOPLE, PERFORMANCE, and VENUE, and each of them has a focal element, respectively ROLE, OPERA, and STAGE. It argues that the second one, OPERA, which refers to "Chinese opera", a prominent form of performing arts in traditional Chinese culture, is the central element that dominates the whole frame. A systematic qualitative analysis of linguistic data shows that, because its source domain centers on CHINESE OPERA, the LIFE IS A SHOW metaphor generates a large number of culture-specific linguistic instantiations in Chinese. A quantitative perspective supported by corpus data reinforces the argument that this metaphor plays a central role in the Chinese conceptualization of events and phenomena in various domains of life, constituting a core component of the Chinese cultural model of life. The study concludes that the SHOW metaphor has a salient subversion LIFE IS AN OPERA in Chinese, in contrast with its sister LIFE IS A PLAY found salient in English.

There only exists one deterministic identity-based encryption (DIBE) scheme which is adaptively secure in the auxiliary-input setting, under the learning with errors (LWE) assumption. However, the master public key consists of O( ) basic matrices. In this paper, we consider to construct adaptively secure DIBE schemes with more compact public parameters from the LWE problem. (i) On the one hand, we gave a generic DIBE construction from lattice-based programmable hash functions with high min-entropy.(ii) On the other hand, when instantiating our generic DIBE construction with four LPHFs with high min-entropy, we can get four adaptively secure DIBE schemes with more compact public parameters. In one of our DIBE schemes, the master public key only consists of (log ) basic matrices.

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We propose an efficient public key encryption scheme which is key-dependent message secure against chosen ciphertext attacks (KDM-CCA) with respect to affine functions based on the decisional composite residuosity assumption. Technically, we achieve KDM-CCA security by enhancing a chosen ciphertext secure scheme based on the high entropy hash proof system with three tools: a key-dependent message encoding, an entropy filter and an authenticated encryption secure against related-key attacks.

Rationalization of the relationship between solvents and crystal habit is of great importance to the development of crystal engineering. In this paper, the impact of different solvents on vanillin habit was investigated. The results show that the crystal habit of vanillin is closely related to the type of solvent, it was found that vanillin crystals were improved to the short and thick plate in organic acid, and the antisolvent water elongates crystals to needles, in contrast, alkane solvents could not change its habit. The molecular assembly preference of vanillin in solution and crystal was investigated by proton nuclear magnetic resonance, electrostatic potential map, noncovalent interaction plot, and crystal structure analysis. The results suggest that vanillin molecules prefer to assemble by a head-to-tail motif via the intermolecular H-bond. The underpinning mechanism of the solvent effect on the vanillin habit was further rationalized by crystal surface analysis and molecular adsorption analysis. "Half-parallel-half-intercepted" and "all-intercepted" H-bonding patterns were observed on the lateral and capped faces, respectively. Different adsorption preferences of propionic acid, water, and n-hexane on the lateral and capped faces were observed via adsorption locator analysis, the adsorbed solvent molecules might result in interference on the crystal growth of corresponding faces, and hence modify the crystal habit.