题目内容
常见密码系统包含的元素是()。
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非对称密码算法又称“双钥密码算法”或“公钥密码算法”,加密密钥和解密密钥不同,并且从其中一个很难推导出另一个。
Microsoft Office文件加密时密码应使用电话号码、生日、姓名等,且密码复杂性在10位以上。
压缩文件使用128-bit AES加密算法目前认为是安全的算法。
Task 1 Listen to the following news reports and write down the correct choice in the blank. ( 把正确答案A,B,C,D 写在对应的框中)- FROM 实训 B2，U 2[音频]Questions 1and 2 are based on the news report you have just heard.1. A. There has been little improvement over the years.B. There will be a great improvement in the near future.C. In some countries there is a decline after a general improvement.D. It has remained the same for decades.2. A. They have become AIDS patients.B. They can’t afford the expenses of education.C. They are influenced by AIDS-related problems.D. There is widespread exploitation of child labor.Questions 3 and 4 are based on the news report you have just heard.3. A. The centenary of Vogue, the fashion magazine.B. The centenary of the National Portrait Gallery.C. In commemoration of Princess Diana.D. In memory of renowned photographers.4. A. She appreciated him, but he did not think highly of her.B. He appreciated her, but she did not think highly of him.C. They appreciated each other.D. They did not like each other.Questions 5 to 7 are based on the news report you have just heard.5. A. A Taiwanese company killed many fish along Vietnam's central coast.B. The Vietnamese government protested against a Taiwanese company.C. Vietnamese protested against a Taiwanese company.D. Vietnamese protested against their government.6. A. Waste from the Taiwanese company.B. Pollution caused by the fish farms.C. The government’s inaction.D. The cause is still unknown.7. A. On April 6. B. Before April 6.C. On Sunday. D. After Sunday.
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