scholarly journals Secure Integration of Asymmetric and Symmetric Encryption Schemes

1999 ◽  
pp. 537-554 ◽  
Author(s):  
Eiichiro Fujisaki ◽  
Tatsuaki Okamoto
Keyword(s):  
Symmetric Encryption ◽  
Encryption Schemes

Siren: Secure data sharing over P2P and F2F networks

2015 ◽  
Vol 52 (2) ◽  
pp. 257-264 ◽  
Author(s):  
Péter Kasza ◽  
Péter Ligeti ◽  
Ádám Nagy
Keyword(s):  
Secret Sharing ◽  
Communication Protocol ◽  
Communication Channels ◽  
Building Blocks ◽  
Security Requirements ◽  
P2p Network ◽  
Secret Sharing Schemes ◽  
Symmetric Encryption ◽  
Encryption Schemes ◽  
Alarm Message

In this paper we propose a decentralized privacy-preserving system which is able to share sensible data in a way, that only predefined subsets of authorized entities can recover the data after getting an additional alarm message. The protocol uses two main communication channels: a P2P network where the encrypted information is stored, and a smaller private P2P network, which consists of the authorized parties called friend-to-friend network. We describe the communication protocol fulfilling the desired security requirements. The proposed protocol achieves unconditional security. The main cryptographic building blocks of the protocol are symmetric encryption schemes and secret sharing schemes.

Secure Integration of Asymmetric and Symmetric Encryption Schemes

2011 ◽  
Vol 26 (1) ◽  
pp. 80-101 ◽  
Author(s):  
Eiichiro Fujisaki ◽  
Tatsuaki Okamoto
Keyword(s):  
Symmetric Encryption ◽  
Encryption Schemes

scholarly journals Security estimates of the NTRUCipher and NTRUCipher+ encryption schemes against BKW-attack

2021 ◽  
pp. 28-32
Author(s):  
Alexandra Matiyko
Keyword(s):  
Encryption Scheme ◽  
Symmetric Encryption ◽  
Chosen Plaintext Attack ◽  
Computational Problem ◽  
Encryption Schemes ◽  
The Given

Due to the need of creation a symmetric encryption scheme for practical usage, the security of which (similarly to asymmetric cryptosystems) is based on the difficulty of solving only one computational problem, in 2017 the NTRUCipher encryption scheme was proposed. Preliminary researches of this encryption scheme have been conducted, but the question of NTRUCipher’s security to certain specific attacks is open. This article provides estimates of the complexity of chosen-plaintext attack on the NTRUCipher encryption scheme and even on its natural improvement NTRUCipher+. The given analytical estimates allow to compare the security of these encryption schemes and to make a conclusion about inexpediency of usage the NTRUCipher+ encryption scheme for its increase.

Ciphertext verification security of symmetric encryption schemes

2009 ◽  
Vol 52 (9) ◽  
pp. 1617-1631 ◽  
Author(s):  
ZhenYu Hu ◽  
FuChun Sun ◽  
JianChun Jiang
Keyword(s):  
Symmetric Encryption ◽  
Encryption Schemes
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