China expected to maintain steady economic growth leading to 2015 NUMBERS released by the National Bureau of Statistics in July show that China＇s GDP growth in the first half of this year slowed to 7.6 percent,with g...China expected to maintain steady economic growth leading to 2015 NUMBERS released by the National Bureau of Statistics in July show that China＇s GDP growth in the first half of this year slowed to 7.6 percent,with growth in the second quarter only reaching 7.5 percent.Optimists believe that economic growth rose more than expected in the second quarter,but some economists say China＇s economy still faces downward pressure,and an economic hard landing is likely.Despite these dire predictions,China will maintain a steady economic growth rate between 7-8 percent during the 12th Five-Year Plan period（2011-15）.展开更多
There is hardly any possibility for Myanmar to obtain its own nuclear weapons in the near future Recently, as rumors of Myanmar’s "nuclear plan" began to swirl in the Western media, even U.S. Secretary of S...There is hardly any possibility for Myanmar to obtain its own nuclear weapons in the near future Recently, as rumors of Myanmar’s "nuclear plan" began to swirl in the Western media, even U.S. Secretary of State Hillary Clinton展开更多
The last four digits of her cell phone number are 0605, which is the date of the annual World Environment Day. The coat she usually wears is blue with white dots, symbolizing clean sky and clouds. Tian Guirong, 54, is...The last four digits of her cell phone number are 0605, which is the date of the annual World Environment Day. The coat she usually wears is blue with white dots, symbolizing clean sky and clouds. Tian Guirong, 54, is a rural woman from Fanling Village, near Xinxiang City in Henan Province, who has earned the moniker of "environmental protection ambassador." She collected 65 tons of discarded batteries in four years to save 1 million square meters of land from contamination. She has organized 43 publicit...展开更多
The Olympic Games will generate enormous business opportunities and facilitate a major face-lift for China. However, some countries have experienced an economic recession after hosting the world's largest sports e...The Olympic Games will generate enormous business opportunities and facilitate a major face-lift for China. However, some countries have experienced an economic recession after hosting the world's largest sports event. This phenomenon has been termed the "post-Olympics bubble." Where will China go after the Olympics? Professor Li Yining at Peking University speaks to People's Daily on this question and other related issues. Excerpts follow:展开更多
Mark Twain famously once said uthere is no humor in heavenn, and new research has found it could be true. Researchers say that highly moral3 people are often unable to get the joke4. They claim this actually often mak...Mark Twain famously once said uthere is no humor in heavenn, and new research has found it could be true. Researchers say that highly moral3 people are often unable to get the joke4. They claim this actually often makes them unlikeable.展开更多
For group signature(GS)supporting membership revocation,verifier-local revocation(VLR)mechanism seems to be a more flexible choice,because it requires only that verifiers download up-to-date revocation information for...For group signature(GS)supporting membership revocation,verifier-local revocation(VLR)mechanism seems to be a more flexible choice,because it requires only that verifiers download up-to-date revocation information for signature verification,and the signers are not involved.As a post-quantum secure cryptographic counterpart of classical number-theoretic cryptographic constructions,the first lattice-based VLR group signature(VLR-GS)was introduced by Langlois et al.(2014).However,none of the contemporary lattice-based VLR-GS schemes provide backward unlinkability(BU),which is an important property to ensure that previously issued signatures remain anonymous and unlinkable even after the corresponding signer(i.e.,member)is revoked.In this study,we introduce the first lattice-based VLR-GS scheme with BU security(VLR-GS-BU),and thus resolve a prominent open problem posed by previous works.Our new scheme enjoys an O(log N)factor saving for bit-sizes of the group public-key(GPK)and the member’s signing secret-key,and it is free of any public-key encryption.In the random oracle model,our scheme is proven secure under two well-known hardness assumptions of the short integer solution(SIS)problem and learning with errors(LWE)problem.展开更多
文摘China expected to maintain steady economic growth leading to 2015 NUMBERS released by the National Bureau of Statistics in July show that China＇s GDP growth in the first half of this year slowed to 7.6 percent,with growth in the second quarter only reaching 7.5 percent.Optimists believe that economic growth rose more than expected in the second quarter,but some economists say China＇s economy still faces downward pressure,and an economic hard landing is likely.Despite these dire predictions,China will maintain a steady economic growth rate between 7-8 percent during the 12th Five-Year Plan period（2011-15）.
文摘There is hardly any possibility for Myanmar to obtain its own nuclear weapons in the near future Recently, as rumors of Myanmar’s "nuclear plan" began to swirl in the Western media, even U.S. Secretary of State Hillary Clinton
文摘The last four digits of her cell phone number are 0605, which is the date of the annual World Environment Day. The coat she usually wears is blue with white dots, symbolizing clean sky and clouds. Tian Guirong, 54, is a rural woman from Fanling Village, near Xinxiang City in Henan Province, who has earned the moniker of "environmental protection ambassador." She collected 65 tons of discarded batteries in four years to save 1 million square meters of land from contamination. She has organized 43 publicit...
文摘The Olympic Games will generate enormous business opportunities and facilitate a major face-lift for China. However, some countries have experienced an economic recession after hosting the world's largest sports event. This phenomenon has been termed the "post-Olympics bubble." Where will China go after the Olympics? Professor Li Yining at Peking University speaks to People's Daily on this question and other related issues. Excerpts follow:
文摘Mark Twain famously once said uthere is no humor in heavenn, and new research has found it could be true. Researchers say that highly moral3 people are often unable to get the joke4. They claim this actually often makes them unlikeable.
基金the National Natural Science Foundation of China(Nos.61802075 and 61772477)the Natural Science Foundation of Henan Province,China(Nos.222300420371 and202300410508)。
文摘For group signature(GS)supporting membership revocation,verifier-local revocation(VLR)mechanism seems to be a more flexible choice,because it requires only that verifiers download up-to-date revocation information for signature verification,and the signers are not involved.As a post-quantum secure cryptographic counterpart of classical number-theoretic cryptographic constructions,the first lattice-based VLR group signature(VLR-GS)was introduced by Langlois et al.(2014).However,none of the contemporary lattice-based VLR-GS schemes provide backward unlinkability(BU),which is an important property to ensure that previously issued signatures remain anonymous and unlinkable even after the corresponding signer(i.e.,member)is revoked.In this study,we introduce the first lattice-based VLR-GS scheme with BU security(VLR-GS-BU),and thus resolve a prominent open problem posed by previous works.Our new scheme enjoys an O(log N)factor saving for bit-sizes of the group public-key(GPK)and the member’s signing secret-key,and it is free of any public-key encryption.In the random oracle model,our scheme is proven secure under two well-known hardness assumptions of the short integer solution(SIS)problem and learning with errors(LWE)problem.
