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A Simple Key Reuse Attack on LWE and Ring LWE Encryption Schemes as Key Encapsulation Mechanisms (KEMs)
LWE RLWE KEM
2019/3/13
In this paper, we present a simple attack on LWE and Ring LWE encryption schemes used directly as Key Encapsulation Mechanisms (KEMs). This attack could work due to the fact that a key mismatch in a K...
Hybrid Key Encapsulation Mechanisms and Authenticated Key Exchange
hybrid key exchange key exchange hybrids
2018/11/9
Concerns about the impact of quantum computers on currently deployed public key cryptography have instigated research into not only quantum-resistant cryptographic primitives but also how to transitio...
Homomorphic-Policy Attribute-Based Key Encapsulation Mechanisms
Attribute-Based Encryption Homomorphic-Policy LSSS
2016/12/7
Attribute-Based Encryption (ABE) allows to target the recipients of a message according
to a policy expressed as a predicate among some attributes. Ciphertext-policy ABE schemes can
choose the polic...
Simulation-based Selective Opening CCA Security for PKE from Key Encapsulation Mechanisms
public-key cryptography selective opening
2016/1/5
We study simulation-based, selective opening security against chosen-ciphertext attacks (SIM-SO-CCA security) for public key encryption (PKE). In a selective opening, chosen-ciphertext attack (SO-CCA)...
Constructing and Understanding Chosen Ciphertext Security via Puncturable Key Encapsulation Mechanisms
public key encryption puncturable key encapsulation mechanism chosen ciphertext security
2016/1/4
In this paper, we introduce and study a new cryptographic primitive that we call puncturable key encapsulation
mechanism (PKEM), which is a special class of KEMs that satisfy some functional and secu...