multiplicative knapsack cryptosystem - meaning and definition. What is multiplicative knapsack cryptosystem
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What (who) is multiplicative knapsack cryptosystem - definition

Naccache-Stern knapsack cryptosystem

Naccache–Stern knapsack cryptosystem         
The Naccache–Stern Knapsack cryptosystem is an atypical public-key cryptosystem developed by David Naccache and Jacques Stern in 1997. This cryptosystem is deterministic, and hence is not semantically secure.
Knapsack cryptosystems         
Knapsack cryptosystems are cryptosystems whose security is based on the hardness of solving the knapsack problem. They remain quite unpopular because simple versions of these algorithms have been broken for several decades.
Multiplicative function         
ARITHMETIC FUNCTION THAT IS MULTIPLICATIVE FOR EVERY PAIR OF COPRIME INTEGERS
Multiplicative series; Multiplicativeness; Multiplicative functions; Non-multiplicative function; Multiplicativity
In number theory, a multiplicative function is an arithmetic function f(n) of a positive integer n with the property that f(1) = 1 and

Wikipedia

Naccache–Stern knapsack cryptosystem

The Naccache–Stern Knapsack cryptosystem is an atypical public-key cryptosystem developed by David Naccache and Jacques Stern in 1997. This cryptosystem is deterministic, and hence is not semantically secure. While unbroken to date, this system also lacks provable security.