| 短消息公钥加密构造Tag-KEM方案 |
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| 引用本文： | 陈原,陈丹,董庆宽.短消息公钥加密构造Tag-KEM方案[J].南京航空航天大学学报(英文版),2009,26(4):301-305. |
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| 作者姓名： | 陈原 陈丹 董庆宽 |
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| 作者单位： | 1. 西安电子科技大学综合业务网国家重点实验室,西安,710071,中国
2. 西安电子科技大学综合业务网国家重点实验室,西安,710071,中国;南京航空航天大学信息科学与技术学院,南京,210016,中国 |
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| 摘 要： | Tag—KEM／DEM是2005年提出的一种混合加密结构。Tag—KEM（Tag密钥封装机制）是其组成部分，采用公钥加密技术封装密钥。针对混合加密中不宜用慢的长消息公钥加密的问题，提出了一种用短消息公钥加密方案构造Tag—KEM方案的通用方法；结果证明了该方法在随机预言机模型下选择密文安全。该方法对Tag部分的处理不会带来额外的冗余，是第一个无需验证Tag部分有效方案。表明Tag—KEM／DEM结构优于KEM＋DEM。
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| 关 键 词： | 信息安全 公钥加密 选择密文安全 Tag—KEM方案 |
METHOD FOR CONSTRUCTING TAG-KEM SCHEMES WITH SHORT-MESSAGE PUBLIC-KEY ENCRYPTIONS |
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| Chen Yuan,Chen Dan,Dong Qingkuan.METHOD FOR CONSTRUCTING TAG-KEM SCHEMES WITH SHORT-MESSAGE PUBLIC-KEY ENCRYPTIONS[J].Transactions of Nanjing University of Aeronautics & Astronautics,2009,26(4):301-305. |
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| Authors: | Chen Yuan Chen Dan Dong Qingkuan |
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| Abstract: | Tag key encapsulation mechanism (Tag-KEM)/data encapsulation mechanism (DEM) is a hybrid framework proposed in 2005.Tag-KEM is one of its parts by using public-key encryption (PKE) technique to en-capsulate a symmetric key.In hybrid encryptions, the long-message PKE is not desired due to its slow operation.A general method is presented for constructing Tag-KEM schemes with short-message PKEs.The chosen cipher-text security is proved in the random oracle model.In the method, the treatment of the tag part brings no addi-tional ciphertext redundancy.Among all the methods for constructing Tag-KEM, the method is the first one without any validity checking on the tag part, thus showing that the Tag-KEM/DEM framework is superior to KEM+DEM one. |
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| Keywords: | information security public-key encryption chosen ciphertext security Tag-KEM scheme |
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