# Argon2i

> password-based key derivation function

**Wikidata**: [Q114883298](https://www.wikidata.org/wiki/Q114883298)  
**Source**: https://4ort.xyz/entity/argon2i

## Summary
Argon2i is a password-based key derivation function that is part of the Argon2 family. It is designed to resist side-channel attacks and is optimized for memory-hard functions, making it highly secure for password hashing.

## Key Facts
- Part of the Argon2 family of password-based key derivation functions
- Designed to resist side-channel attacks
- Optimized for memory-hard functions
- Used for secure password hashing
- Part of the broader Argon2 cryptographic framework

## FAQs
### Q: What is the primary purpose of Argon2i?
A: Argon2i is primarily used as a password-based key derivation function to securely hash passwords, resisting side-channel attacks.

### Q: How does Argon2i differ from other key derivation functions?
A: Argon2i is part of the Argon2 family, which is designed to be memory-hard and resistant to side-channel attacks, distinguishing it from other key derivation functions.

### Q: Is Argon2i part of the Argon2 cryptographic framework?
A: Yes, Argon2i is one of the variants within the Argon2 framework, alongside Argon2d and Argon2id.

## Why It Matters
Argon2i plays a crucial role in modern cryptography by providing a robust method for password hashing. Its design ensures resistance to side-channel attacks, making it a preferred choice for securing sensitive data. By being memory-hard, it effectively slows down brute-force attacks, enhancing overall security. As part of the Argon2 family, it contributes to a broader cryptographic toolkit that prioritizes security and efficiency. Its adoption in various security protocols underscores its importance in protecting digital assets and user credentials.

## Notable For
- Being part of the Argon2 family, which includes Argon2d and Argon2id
- Designed to resist side-channel attacks
- Optimized for memory-hard functions
- Used in password hashing for enhanced security
- Part of a broader cryptographic framework

## Body
### Overview
Argon2i is a password-based key derivation function that is part of the Argon2 family. It is designed to be memory-hard and resistant to side-channel attacks, making it a secure choice for password hashing.

### Design and Features
- **Memory-Hard**: Argon2i is optimized for memory-hard functions, which slows down brute-force attacks.
- **Side-Channel Resistance**: It is designed to resist side-channel attacks, ensuring secure password hashing.
- **Part of Argon2**: Argon2i is one of the variants within the Argon2 framework, which includes Argon2d and Argon2id.

### Applications
- **Password Hashing**: Argon2i is used for secure password hashing, providing robust protection against various attack vectors.
- **Cryptographic Security**: It contributes to the broader field of cryptographic security by offering a reliable method for key derivation.

### Significance
Argon2i's inclusion in the Argon2 family highlights its role in modern cryptography. Its design principles and features make it a valuable tool for securing sensitive data and user credentials.