## What is/are Entropy Source?

Entropy Source - However, the design in [2] requires 112K bits of entropy, and that in [6] uses many AES S-boxes, as well as entropy sources.^{[1]}The entropy source of these PUFs is the set voltage deviation in the fabricated memristors.

^{[2]}The main contribution is a low complexity and efficient coder, based on Tabled Asymmetric Numeral Systems (tANS), well suited for a wide range of entropy sources and with simple hardware implementation.

^{[3]}However, TRNG uses an entropy source based on non-deterministic effects challenging to replicate in FPGA.

^{[4]}In this work, we introduce, analyse, and compare three dynamic calibration mechanisms for the COherent Sampling ring Oscillator based TRNG: GateVar, WireVar, and LUTVar, enabling easy integration of the entropy source into complex systems.

^{[5]}SRAM-PUFs are well-known as entropy sources; nevertheless, due of non-deterministic noise environment during the power-up process, they are subject to low challenge-response repeatability.

^{[6]}The mid-way and output monitoring ports on the chip can potentially be used for health checks to improve the long-term stability and reliability of QRNG in line with NIST recommendations for entropy source.

^{[7]}In this study, inspired by NIST’s latest entropy estimation recommendations, we proposed a methodology for analyzing and validating a sensor-based entropy source, highlighted by an innovative experiment design.

^{[8]}TRNG utilizes a different jitter caused by PVT variations as an entropy source.

^{[9]}• We obtain a single-round network extractor protocol for poly-logarithmic min-entropy sources that tolerates an optimal number of adversarial corruptions.

^{[10]}At the second optimization, the entropy source was selected as a fitness function for optimization by examining the P-value of the mono-test frequency.

^{[11]}Measures are proposed for reliably estimating the entropy of bits produced in an entropy source using a chaotic physical system.

^{[12]}To improve the security, we evaluate the randomness of the entropy source by min-entropy and exploit the information-theoretically provable Toeplitz-hashing extractor.

^{[13]}The study is then extended to assess the importance of the entropy source term for the flow over a rectangular cavity.

^{[14]}TRNG circuits with high degree of randomness and low power consumption may be fabricated by using the random telegraph noise (RTN) current signals produced by polarized metal/insulator/metal (MIM) devices as entropy source.

^{[15]}In this work, we introduce scattering as a method to enhance the randomness characteristics of the entropy source.

^{[16]}, wherein performance counters are considered as entropy sources.

^{[17]}It uses the inherent randomness of telegraph noise in the channel current of a single CMOS transistor as an entropy source.

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## true random number

This work presents a true random number generator (TRNG) that uses noise and jitter in a continuous-time, deltasigma modulator (CTDSM) as entropy source.^{[1]}Currently, True Random Number Generation (TRNG) is relatively slow, utilizing natural, physical processes as its entropy source.

^{[2]}This paper deals with the design of a true random number generator (TRNG) using the fingerprint as an entropy source and its implementation in substitution box (S-box) of Advanced Encryption Standard (AES).

^{[3]}The proposed CCII+ based analog chaos circuit has been used as the entropy source of a true random number generator to show that it can form a basis for different chaotic applications.

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## random number generator

As one of the entropy sources, a physical random number generator is used as a true random number generator, relying on its irreproducibility.^{[1]}Chaotic maps and circuits that display chaotic behavior as entropy sources are used to implement the random number generators (RNGs).

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## High Entropy Source

Surprisingly, if we choose seed numbers from high entropy sources, with a minimum number of rounds, the quality of the random numbers generated is sufficient to successfully perform accurate DPD simulations.^{[1]}The LFSR can be configured dynamically to provide a high entropy source and large enough CRP space.

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## Hybrid Entropy Source

The hybrid entropy source provides a broadband analog optical chaos signal, which could serve as the carrier to load quadrature amplitude modulation (QAM) data.^{[1]}We experimentally demonstrate a chaotic synchronization scheme based on the electro-optic hybrid entropy sources.

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