On the Memory-Tightness of Hashed ElGamal
On the Memory-Tightness of Hashed ElGamal
复制标题
关于哈希 ElGamal 的内存紧张性
DOI:
10.1007/978-3-030-45724-2_2
复制
发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Tessaro, Stefano
中科院分区:
文献类型:
--
作者:
Ghoshal, Ashrujit;Tessaro, Stefano
We study the memory-tightness of security reductions in public-key cryptography, focusing in particular on Hashed ElGamal. We prove that anystraightline(i.e., without rewinding) black-box reduction needs memory which grows linearly with the number of queries of the adversary it has access to, as long as this reduction treats the underlying group generically. This makes progress towards proving a conjecture by Auerbachet al.(CRYPTO 2017), and is also the first lower bound on memory-tightness for a concrete cryptographic scheme (as opposed to generalized reductions across security notions). Our proof relies on compression arguments in the generic group model.
DOI:
--
发表时间:
2017
期刊:
IACR Cryptology ePrint Archive
影响因子:
--
作者:
Benedikt Auerbach;David Cash;Manuel Fersch;Eike Kiltz
通讯作者:
Eike Kiltz
DOI:
--
发表时间:
2010
期刊:
Annual International Cryptology Conference
影响因子:
--
作者:
Anindya De;L. Trevisan;Madhur Tulsiani
通讯作者:
Madhur Tulsiani