Cryptographic properties of the single cycle T-function's output sequences are investigated.Bounds of autocorrelation functions of the kth coordinate sequence and bounds of state output sequence are calculated res...Cryptographic properties of the single cycle T-function's output sequences are investigated.Bounds of autocorrelation functions of the kth coordinate sequence and bounds of state output sequence are calculated respectively.The Maximum Sidelobe Ratio(MSR) of the kth coordinate sequence and the MSR of state output sequence are given respectively.The bounds of autocorrelation functions show that the values of autocorrelation functions are large when shifts are small.Comparisons of the autocorrelations between the state output sequence and coordinate output sequence are illustrated.The autocorrelation properties demonstrate that T-functions have cryptographic weaknesses and the illustration result shows coordinate output sequences have better autocorrelation than that of state output sequences.展开更多
Four kinds of sequences generated by single cycle triangular function (T-function) are investigated to check the possibility for a single cycle T-function to be a cryptographic component in stream ciphers. Based on ...Four kinds of sequences generated by single cycle triangular function (T-function) are investigated to check the possibility for a single cycle T-function to be a cryptographic component in stream ciphers. Based on the special properties of single cycle T-function and an algorithm due to Wei, linear complexities of these four kinds of sequence are all acquired. The results show that single cycle T-function sequences have high linear complexity. Therefore, T-function satisfies the essential requirements being a basic component of stream cipher.展开更多
目的探讨针刺联合疏肝化瘀方在慢性乙型重型肝炎(chronic severe hepatitis B,CSHB)治疗中的应用价值。方法选取100例慢性乙型重型肝炎患者,随机分为西医组、针刺组、中药组和联合组,每组25例。西医组予以常规西医治疗,于此基础上,针刺...目的探讨针刺联合疏肝化瘀方在慢性乙型重型肝炎(chronic severe hepatitis B,CSHB)治疗中的应用价值。方法选取100例慢性乙型重型肝炎患者,随机分为西医组、针刺组、中药组和联合组,每组25例。西医组予以常规西医治疗,于此基础上,针刺组予以针刺治疗,中药组予以疏肝化瘀方,联合组予以针刺联合疏肝化瘀方治疗。观察4组临床疗效与安全性,比较4组治疗前、治疗1个月后、治疗6个月后中医症候积分、肝功能指标[谷丙转氨酶(alanine aminotransferase,ALT)、谷草转氨酶(aspartate aminotransferase,AST)及γ-谷氨酰转肽酶(γ-glutamyl transpeptidase,GGT)]和T淋巴细胞亚群(CD^(4+)、CD^(8﹢)和CD^(4+)/CD^(8﹢))。结果联合组、中药组及针刺组总有效率均高于西医组(P<0.05);治疗1个月、6个月后,联合组、中药组及针刺组中医证候主症、次症积分及总积分低于西医组(P<0.05);治疗1个月、6个月后联合组ALT、AST、GGT水平及CD^(8﹢)低于中药组、针刺组和西医组,CD^(4+)及CD^(4+)/CD^(8﹢)高于中药组、针刺组、西医组(P<0.05);4组治疗期间均未出现不良反应。结论在西医常规治疗基础上,针刺联合疏肝化瘀方联合治疗CSHB可提高疗效,改善免疫功能与肝功能,缓解患者症状,且具有较高安全性。展开更多
基金supported by National Natural Science Foundation of China under Grant No.60833008,60970119the Scientific Research Foundation of Education of Department of Shaanxi Provincial Government of China under Grant No.11JK0503+1 种基金Youth Science and Technology Foundation of Xi'an University of Architecture and Technology under Grant No.QN0831,QN1024Foundation of Guangxi Key Laboratory of Information and Communications under Grant No.20902
文摘Cryptographic properties of the single cycle T-function's output sequences are investigated.Bounds of autocorrelation functions of the kth coordinate sequence and bounds of state output sequence are calculated respectively.The Maximum Sidelobe Ratio(MSR) of the kth coordinate sequence and the MSR of state output sequence are given respectively.The bounds of autocorrelation functions show that the values of autocorrelation functions are large when shifts are small.Comparisons of the autocorrelations between the state output sequence and coordinate output sequence are illustrated.The autocorrelation properties demonstrate that T-functions have cryptographic weaknesses and the illustration result shows coordinate output sequences have better autocorrelation than that of state output sequences.
基金supported by the National Natural Science Foundation of China (60833008,60803149)the Scientific Research Foundation of Education Department of Shaanxi Provincial Government of China (11JK0503)the Youth Science and Technology Foundation of Xi’an University of Architecture and Technology (QN0831,QN1024)
文摘Four kinds of sequences generated by single cycle triangular function (T-function) are investigated to check the possibility for a single cycle T-function to be a cryptographic component in stream ciphers. Based on the special properties of single cycle T-function and an algorithm due to Wei, linear complexities of these four kinds of sequence are all acquired. The results show that single cycle T-function sequences have high linear complexity. Therefore, T-function satisfies the essential requirements being a basic component of stream cipher.