数学联邦政治世界观
超小超大

函数加密体制(一) (13-7)

Defining security of abstract functional encryption turns out to be highly non-trivial We begin with a natural indistinguishability game-based definition (based on a defini- tion of secure predicate encryption from |BW07.KSW081). Unfortunately, we show that this simple definition is inadeguate for certain functionalities since trivially inse- cure constructions may satisfy it.

Given the inadequacy of game-based definitions we move to simulation-based def- initions in the spirit of the original notion of semantic security of Goldwasser and Micali [GM84].The goal is to capture the notion that the adversary learns nothing about the plaintext other than functions F(k,·) of the plaintext for which he has a secret key. Somewhat surprisingly, we show a connection to non-committing encryp- tion [CFGN96,Nie02] which proves that our definition cannot be satisfied for the same reason that non-interactive non-committing encryption is impossible. However, we show that our definition can be satisfied in the random oracle model,and we ex- hibit constructions for interesting functionalities that can be shown to be secure.(Inde- pendently, O'Neill[ON10]also observed a gap between simulation and game-based definitions and a connection to non-committing encryption.)

数学联邦政治世界观提示您:看后求收藏(同人小说网http://tongren.me),接着再看更方便。

相关小说

独占人家反被撂倒真是丢死人啦! 连载中
独占人家反被撂倒真是丢死人啦!
莹莹bee
简介正在更新
0.4万字9个月前
黑化徒弟萌宠师 连载中
黑化徒弟萌宠师
萧萧九州
现代少女木小小一不小心穿成了小说中男主的反派师尊,怎么办呢?不慌,木小小自认好歹是接受了九年义务教育的高等生,会怕区区穿越?她相信只要她一心......
78.3万字9个月前
宠妻上瘾,帝尊大大不要啊 连载中
宠妻上瘾,帝尊大大不要啊
银河柒分甜
这人很懒,啥都没写。
12.7万字9个月前
凤逆天下之狐初 连载中
凤逆天下之狐初
明舞&殇蝶
与凰北月的同胞妹妹凰北明因为与姐姐一起执行任务而穿越到了一个新大陆里某女主:等等,为什么我是一只狐狸?某位为妹妹操碎了心的姐姐:妹妹太强了,......
12.5万字9个月前
夺舍:废材大小姐太妖娆 连载中
夺舍:废材大小姐太妖娆
夏祁森
“去哪呢?”某男看着刚刚回来的人见问。“手滑了,不小心打了太子!”某女四处张望心虚的摸了摸鼻尖。“手没事吧?下次别自己动手!手会疼!”……“......
2.4万字9个月前
关于我离奇的生活 连载中
关于我离奇的生活
云末_
35.0万字9个月前