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python


Black-Scholes formula

Finance

 Posted on January 28, 2021  |  4 minutes  |  748 words  |  Iulian Costan

Black-Scholes formula… maybe not as important and well-known as compounding interest-rate but still the most famous formula among options traders. [Read More]
trading  options  put  call  black-scholes  volatility  python 

Generate IOTA address

IOTA

 Posted on December 28, 2020  |  6 minutes  |  1074 words  |  Iulian Costan

Generate IOTA address using plain old Python, starting with random seed, derive private key, and finally the checksum and address. [Read More]
iota  address  generation  crypto  python 

Generate Ethereum Address

Ethereum

 Posted on October 27, 2020  |  3 minutes  |  499 words  |  Iulian Costan

Generate Ethereum address from private key using plain old Python3, Elliptic Curve multiplication from SageMath and of course Keccak hash function. [Read More]
ethereum  address  generation  python  crypto 

Generate Monero address

Monero

 Posted on July 18, 2020  |  3 minutes  |  607 words  |  Iulian Costan

Generate Monero address from the root private key using plain old Python, Edwards curve's ed25519 implementation, Keccak-256 hashing and Monero's Base58 encoding. [Read More]
monero  address  generation  python  crypto 

Elliptic curves

Cryptography

 Posted on September 25, 2019  |  5 minutes  |  1030 words  |  Iulian Costan

The easiest way to understand Elliptic Curve (EC), point addition, scalar multiplication and trapdoor function; explained with simple graphs and animations. [Read More]
cryptography  elliptic-curve  math  sagemath  python 

Zero-knowledge proofs

Cryptography

 Posted on August 26, 2019  |  7 minutes  |  1481 words  |  Iulian Costan

Zero-knowledge is a method to prove that you know a secret ``x`` (e.g. a password, private key, piece of knowledge, etc) without revealing that secret. [Read More]
cryptography  zero-knowledge-proof  math  python  zcash 

Zero-knowledge proofs

Cryptography

 Posted on August 26, 2019  |  7 minutes  |  1416 words  |  Iulian Costan

— layout: post title: "Zero-knowledge proofs" subtitle: Cryptography date: 2019-08-26 tags: ["cryptography", "zero-knowledge-proof", "math", "python", "zcash"] — [Read More]
cryptography  zero-knowledge-proof  python  math 

EC-Schnorr

Cryptography

 Posted on June 25, 2019  |  4 minutes  |  662 words  |  Iulian Costan

Overview EC-Schnorr, as the name suggests, is a Schnorr-type digital signature scheme over elliptic curve, it's ECDSA's little sister and Schnorr's big brother implemented in the upcoming MuSig in Bitcoin. [Read More]
cryptography  schnorr  ellipticcurve  math  python  sagemath 

ECDSA

Cryptography

 Posted on April 9, 2019  |  4 minutes  |  818 words  |  Iulian Costan

Elliptic curve cryptography (ECC) and digital signature algorithm (ECDSA) are more complex than RSA or ElGamal but I will try my best to hide the hairy math and the implementation details. [Read More]
cryptography  ecdsa  discrete-logarithm  math  eli5  python  sagemath 

ElGamal

Cryptography

 Posted on March 26, 2019  |  4 minutes  |  816 words  |  Iulian Costan

ElGamal is a public key cryptosystem that is used in encryption , digital signature and homomorphic cryptography. [Read More]
cryptography  elgamal  discrete-logarithm  math  eli5  python 

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