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README.md

Crycur

     Crycur is a commandline tool that introduces helpful functionalities for blockchain based crypto currency application. Including, DSA parameter generation, random transaction block generation, proof of work calculation of transaction blocks for the chain, and validation for transaction blocks as well as the chain itself.

     Crycur is OS independent. Meaning that, one can start block or dsa parameter generation and/or mining functions in one operating system and continue in another. Final result will be valid in all operating systems.

Implemented by:

Getting Started

Prerequisites:

  • Python (Python 3 version ≥3.5; Python 2 version 2.7.x)
  • pip for python package management

Installation and Running

     Firstly, clone or download this repository, then run the following command in the project root to install needed dependencies

$ pip install -r requirements.txt

After installation succeeds, you can start using the tool by executing the provided functionalities in the following format

$ python crycur.py [COMMAND] [OPTIONS]

For more information execute $ python crycur.py --help

Adapted Cryptocurrency Format

     For the proof of work(PoW) algorithm of mining, sha3_256 is adapted. Every link of the chain consists of previous link's PoW, Merkle root hash the transaction block, nonce value and PoW of link.

     Transaction blocks contains number of transactions which are hashed together to form a link in chain. Lastly, DSA parameters consist of 2 large primes and a generator number.

Example Transaction:

*** Bitcoin transaction ***
Serial number: 307217148074680400305152224313952843912
p: 19048168494944007748040397400192319975532006557423228306689086543231957739081924107766832688293691764564143438388412395263055782926823098685975722280398104115250680114205844386021939910971747650259776834788404090407191890847225387752179464018884391149850006988572188284948595588845624071548085823239830412909747077208792607018037728525897345958063942101709068644873743530359687877939644267199232952043255134851061711385840105170041858478516296519691141008312755706469482055609119913841786178247060667837792940073095359627780989622050482703674763731539873811487577313688058097953846602217430512017551343920359732582941
q: 76620299962535251014217660398861102873449179589067496445746187681031064064779
g: 5635401192098599368871022780162285493865426560025724532723444671444622857198187081325909237571693542097820004448316297528820177381783243894825425951433448015295136890283968945659036146103716822022523425633979589820238350767854087501041017942256616070427618813054986396600247206954892197456423027913830587554237655800203561898472768378173835169428053540819834685074373008969580941148135383731745252683873628475556095461445665277261675930562061970731323237285418561368551000528028352654060302157706783779540027528124894847196306763794264730955741278349628000388720449951884938269510142001150361674183732212431229633085
Payer Public Key (beta): 11561463814194164236935604096232260941357135976132825344117384058503325786623955836613017730442267536147853199744445460018024545139345709301912841827286921780284312175566272710229665595887506626582676750369562625069243721710275447149159310228581093647400129197834511374695323153827339320106407939303383286077181257741285435822881449474552464141486898214680129948364113067581713030535413492673659232628949772017037810085775104461583994555862029325631831407817289882512645731879095815358432131189706105819481820741019764273088045110176146012856179403501932353214104676513390078452779341450287842813388398024138108230136
Payee Public Key (beta): 5399068293198336906816934552409515111673303769767792772666129450005157999385151471823657254811625445714569067040523361389167746825702410292341701890020815920654910426844076017592795698861283602126592600366163821138590428086435110669068596902482188147791490978825888326205734574567282251068502470690851946627973975540527237557434600344960229210507012791990208471665661735139933022942989688422812635666575854488591603820226322824294882757052812458262790173721630628494532285294737194531263690735792382284700220429019830616470094581723246613340369530227458238148342966411455532658744089480167482899206796058316595465047
Amount: 159 Satoshi
Signature (r): 15679016414051422551927741732322328985193358337434896684816081627911755878289
Signature (s): 54263384594195688933119688809194230887830517334781056082567188955628529289592

Example Link in Chain:

000000a585da6ab70be4128da8a9583f8888cee1a8a3ff65f05284eea68550d1
875280714797792d05ea38e57ecfc91dc5406c376f935ec0df45586889f6a41f
315748198267374607845047734207626022876
0000000c0d2be69ed5d7c93247de41961999ac2dfa356ef05587842b7f2ff84b

Acknowledgement

This project initially created as a part of the term project for CS411 - Cryptography lecture of Sabanci University

About

Implementing functions for signature and verification of transactions and calculating proof-of-work for blockchains.

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