The Local Forking Lemma and Its Application to Deterministic Encryption

The Local Forking Lemma and Its Application to Deterministic Encryption
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局部分叉引理及其在确定性加密中的应用

DOI:
10.1007/978-3-030-34618-8_21
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发表时间:
2019
期刊:
Part III
影响因子:
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通讯作者:
Mihir Bellare, Wei Dai
Mihir Bellare, Wei Dai
中科院分区:
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文献类型:
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作者:
Mihir Bellare, Wei Dai

文献摘要

相似文献

我们绕过不可能的结果确定性加密的公钥依赖的消息,表明,在这种设置中,经典的加密与哈希方案提供消息恢复安全,在广泛的消息分布。证明依赖于分叉引理的一个新变体,其中随机预言机仅在单个分叉点上重新编程,而不是在分叉后的所有点上重新编程。
We bypass impossibility results for the deterministic encryption of public-key-dependent messages, showing that, in this setting, the classical Encrypt-with-Hash scheme provides message-recovery security, across a broad range of message distributions. The proof relies on a new variant of the forking lemma in which the random oracle is reprogrammed on just a single fork point rather than on all points past the fork.