# Argon2id

> password-based key derivation function

**Wikidata**: [Q114883301](https://www.wikidata.org/wiki/Q114883301)  
**Source**: https://4ort.xyz/entity/argon2id

## Summary
Argon2id is a password-based key derivation function that is part of the Argon2 family. It combines the security benefits of Argon2i (resistance to side-channel attacks) and Argon2d (memory-hardness) to provide robust protection against brute-force and timing attacks.

## Key Facts
- **Part of Argon2**: Argon2id is a variant of the Argon2 password-based key derivation function.
- **Instance of**: It is classified as a key derivation function, used to derive secret keys from passwords.
- **Security Features**: Argon2id combines the resistance to side-channel attacks of Argon2i with the memory-hardness of Argon2d.
- **Wikidata Description**: It is described as a password-based key derivation function.
- **Related to**: Key derivation functions, which derive one or more secret keys from a secret value.

## FAQs
### Q: What makes Argon2id different from other key derivation functions?
A: Argon2id combines the security features of Argon2i (resistance to side-channel attacks) and Argon2d (memory-hardness), making it more resistant to brute-force and timing attacks compared to other functions.

### Q: Is Argon2id part of the Argon2 family?
A: Yes, Argon2id is a variant of the Argon2 password-based key derivation function, designed to enhance security through combined features.

### Q: What problem does Argon2id solve?
A: Argon2id provides robust protection against brute-force and timing attacks by combining the strengths of Argon2i and Argon2d, making it suitable for secure password hashing.

## Why It Matters
Argon2id is significant in the field of cryptography because it addresses critical vulnerabilities in password-based key derivation functions. By combining the resistance to side-channel attacks of Argon2i with the memory-hardness of Argon2d, Argon2id enhances security against brute-force and timing attacks. This makes it a valuable tool for applications requiring strong password protection, such as authentication systems and secure storage solutions. Its inclusion in the Argon2 family ensures continued innovation in password security, providing a reliable and robust solution for modern cryptographic needs.

## Notable For
- **Combined Security Features**: Argon2id uniquely combines the resistance to side-channel attacks of Argon2i with the memory-hardness of Argon2d.
- **Password-Based Key Derivation**: It is specifically designed for deriving secret keys from passwords, making it essential for secure authentication.
- **Part of Argon2 Family**: Its inclusion in the Argon2 family ensures continued development and adoption in cryptographic applications.
- **Resistance to Attacks**: Argon2id provides enhanced protection against brute-force and timing attacks, making it a preferred choice for secure password hashing.

## Body
### Overview
Argon2id is a variant of the Argon2 password-based key derivation function, designed to provide robust security for password hashing. It combines the resistance to side-channel attacks of Argon2i with the memory-hardness of Argon2d, making it a versatile and secure option for cryptographic applications.

### Security Features
- **Side-Channel Resistance**: Like Argon2i, Argon2id is resistant to side-channel attacks, ensuring secure password hashing.
- **Memory-Hardness**: It incorporates the memory-hardness of Argon2d, making it resistant to brute-force attacks.
- **Combined Strengths**: The combination of these features provides enhanced security against various attack vectors.

### Applications
- **Password Hashing**: Argon2id is widely used for secure password hashing in authentication systems.
- **Secure Storage**: It ensures secure storage of sensitive data by deriving strong keys from passwords.
- **Cryptographic Security**: Its inclusion in the Argon2 family ensures continued innovation and adoption in cryptographic security.

### Relationships
- **Part of Argon2**: Argon2id is a variant of the Argon2 family, which includes other password-based key derivation functions.
- **Key Derivation Function**: It is classified as a key derivation function, used to derive secret keys from passwords.
- **Related to**: Key derivation functions, which are essential for secure cryptographic operations.