TideCoin - Open Source Post-Quantum Security

Introduction

Tidecoin is a peer-to-peer digital currency that enables instant, near-zero cost payments to anyone in the world. An open source global payment network, and fully decentralized without any central authorities.

Features of Post-Quantum security make Tidecoin a pontential replacement for Bitcoin. Tidecoin's new cryptography algorithm 'Falcon' is a lattice-based cryptography algorithm, based on the theoretical framework of Gentry, Peikert and Vaikuntanathan.

There is no efficient solving algorithm currently known in the general case, even with the help of quantum computers, because the underlying, difficult problem is the short integer solution problem (SIS) over NTRU lattices.

09/Dec/2020, "Photonic Quantum Computer Displays 'Supremacy' Over Supercomputers", a news' title from spectrum.ieee.org. It clearly shows that billions of value on the Bitcoin network is facing the threat of Quantum computers. It is time to build a Post-Quantum security cryptocurrency. Tidecoin aims to build a quantum secure cryptocurrency.

Features

NIST's Post-Quantum security standard

Total supply: 21,000,000 TDC

PoW only consensus, no pre-mine, no ico

Segwit supported, reduces block size largely

One minute block time for faster payments

CPU friendly PoW algorithm, more inclusive

Exponential increase halving time：0.5, 1, 2, 4 ... years

NIST Post-Quantum Cryptography Standardization

"It is a program and competition by NIST to update their standards to include post-quantum cryptography.

It was announced at PQCrypto 2016. 23 signature schemes and 59 encryption/KEM schemes were submitted by the initial submission deadline at the end of 2017, of which 69 total were deemed complete and proper and participated in the first round.

Seven of these, of which 3 are signature schemes, have advanced to the third round, which was announced on July 22, 2020"

— Wikipedia

Falcon

Fast-Fourier Lattice-based Compact Signatures over NTRU

Falcon offers the following features:

— Security : A true Gaussian sampler is used internally, which guarantees negligible leakage of information on the secret key up to a practically infinite number of signatures (more than 264).

To give a point of comparison, Falcon-512 is roughly equivalent, in classical security terms, to RSA-2048, whose signatures and public keys use 256 bytes each.
— Compactness : Thanks to the use of NTRU lattices, signatures are substantially shorter than in any lattice-based signature scheme with the same security guarantees, while the public keys are around the same size.
— Speed : Use of fast Fourier sampling allows for very fast implementations, in the thousands of signatures per second on a common computer; verification is five to ten times faster.
— Scalability : Operations have cost O (n log n) for degree n, allowing the use of very long-term security parameters at moderate cost.
— RAM Economy : The enhanced key generation algorithm of Falcon uses less than 30 kilobytes of RAM, a hundredfold improvement over previous design such as NTRU Sign. Falcon is compatible with small, memory-constrained embedded devices.

Learn more about Falcon — What is Falcon?