Elliptic Curve Cryptography / Key Pair generation

Create and explore cryptographic key pairs used in Bitcoin.

Hierarchical Deterministic Wallet (HD Wallet)

Understand how wallets generate many keys from a single seed

Bitcoin Block Parser

Analyze the contents of Bitcoin blocks

Shamir's Secret Sharing Scheme

Learn how secrets (like private keys) can be split and shared securely

BIP Schnorr Signatures

Experiment with Schnorr signature schemes for Bitcoin.

MuSig: Key Aggregation for Schnorr Signatures

Combine multiple public keys into one aggregated key.

Transaction Creator

Build Bitcoin transactions manually

Aezeed Cipher Seed Scheme

Explore a seed encryption format.

Macaroons

Study a flexible authorization credential system.

Wallet Import Helper

Assist in importing wallets

Confidentiality

Ensures only authorized parties can read the information.

Implemented through encryption (stream ciphers, block ciphers, public key encryption).

Data Integrity

Ensures data has not been altered accidentally or maliciously. Tools: Hash functions, MACs, Digital Signatures. Example: A hash function can detect changes in data.

Data Origin Authentication

Confirms who sent the data. Stronger than just integrity: proves both unchanged data and authentic sender. Example: Message Authentication Codes (MACs).

Non-Repudiation

Prevents the sender from denying they sent the message.

Tool: Digital Signatures (like a legal contract, but stronger because they can't be forged without the private key).

Entity Authentication

Answers the question: "Who are you?" Verifies the identity of a user or system (e.g., passwords, biometrics, cryptographic tokens). Different from message authentication-this is about authenticating a person or device.

Cryptographic Algorithms

The mathematical rules for encryption and decryption (e.g., AES, RSA, SHA-256).

Keys

Secret values used to encrypt/decrypt data. Security depends on key length and secrecy.

Key Management

Generating, distributing, storing, and revoking keys properly.

Performance

Choosing between symmetric (fast) and asymmetric (secure but slower) methods depending on the scenario.

Trust

Using strong, tested cryptographic methods (not outdated like MD5 or DES).

Data Protection

Encrypts sensitive information (files, databases, cloud storage).

Secure Communication

Protects emails, chats, and online transactions (SSL/TLS).

Authentication & Identity

Used in login systems, certificates, and digital IDs.

Network Security

Protects against eavesdropping and man-in-the-middle attacks (VPNs, Wi-Fi security).

Compliance

Required by laws and standards (e.g., GDPR, HIPAA) for sensitive data.

AES (Advanced Encryption Standard)

is a fast, symmetric encryption algorithm that uses one key for both encryption and decryption, making it ideal for encrypting large amounts of data.

. RSA (Rivest-Shamir-Adleman)

is a slower, asymmetric encryption algorithm that uses a pair of keys (a public key for encryption and a private key for decryption), which is excellent for secure key exchange and digital signatures over insecure networks.

Algorithm

to provide a precise, step-by-step set of instructions to perform a task or solve a problem in a consistent and repeatable manner, ensuring a predictable outcome from a given input. Think of it as a recipe for computers or humans to follow, guiding actions to achieve a specific goal, whether it's sorting numbers, finding directions, or processing data on social media.