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

你好!年轻的我们 连载中
你好!年轻的我们
妍兮🍀
林鱼念和她的朋友们幻想到了年轻的自己,与年轻的自己展开了一系列的故事。
0.3万字9个月前
军:娇妻是控? 连载中
军:娇妻是控?
红尘逸景
一见钟情?还是冤家路窄??缘分只要一来,你想错过或者是当不曾发生。那都不可能,你想忘记就有人让你想起。大叔,你到底想干嘛?我们老大对你有兴趣......
55.8万字9个月前
我与恶龙不得不说的故事 连载中
我与恶龙不得不说的故事
刖清
贫穷打工仔绑上大款的故事
5.3万字9个月前
殿下的蠢萌小妖后 连载中
殿下的蠢萌小妖后
子期勿归
有一天,即将渡劫成功的她,莫名其妙的就被某个大魔头带回了家???小狐狸表示有点懵。这人竟然就是那个六界大魔头!还说本宝宝不可爱?哼╯^╰【未......
9.5万字9个月前
创丹cp 连载中
创丹cp
139***621_6282166776
0.0万字9个月前
凹凸:金k 连载中
凹凸:金k
晚舟晨希
CP:金k,嘉瑞,洁凯
0.2万字9个月前