python

Black-Scholes formula

Finance

| 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]

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Generate IOTA address

IOTA

| 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]

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Generate Ethereum Address

Ethereum

| 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]

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Generate Monero address

Monero

| 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]

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Elliptic curves

Cryptography

| 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]

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Zero-knowledge proofs

Cryptography

| 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]

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Zero-knowledge proofs

Cryptography

| 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]

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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]

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ElGamal

Cryptography

| 4 minutes | 816 words | Iulian Costan

ElGamal is a public key cryptosystem that is used in encryption , digital signature and homomorphic cryptography. [Read More]

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