# crypt

> key derivation function ("password hash")

**Wikidata**: [Q15995009](https://www.wikidata.org/wiki/Q15995009)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Crypt_(C))  
**Source**: https://4ort.xyz/entity/crypt

## Summary
Crypt is a key derivation function, also known as a "password hash," used to derive one or more secret keys from a secret value. It is classified as a key derivation function and has been documented in multiple languages including English, Russian, and Ukrainian.

## Key Facts
- Instance of: key derivation function
- Freebase ID: /m/0r4ksr1
- Wikipedia title: Crypt (C)
- Available in 3 languages: English, Russian, Ukrainian
- Microsoft Academic ID (discontinued): 66090201
- Sitelink count: 3
- Related to key derivation function class with 14 sitelinks

## FAQs
### Q: What is crypt used for?
A: Crypt is a key derivation function that derives secret keys from a secret value, commonly used as a password hash for secure authentication and data protection.

### Q: How is crypt classified in technical terms?
A: Crypt is classified as a key derivation function, which is a type of cryptographic function that transforms a secret value into one or more secret keys.

### Q: What languages is crypt documented in?
A: Crypt is documented in English, Russian, and Ukrainian Wikipedia editions.

## Why It Matters
Crypt plays a crucial role in modern cryptography as a key derivation function, providing a secure method for transforming passwords and other secret values into cryptographic keys. This function is essential for protecting sensitive data and ensuring secure authentication systems. By deriving keys from secret values, crypt helps prevent unauthorized access and strengthens overall system security. Its implementation in various programming languages and systems makes it a fundamental building block in cybersecurity infrastructure, contributing to the protection of digital assets and user privacy across countless applications.

## Notable For
- Classified as a key derivation function ("password hash")
- Documented across multiple language Wikipedia editions
- Associated with Microsoft Academic research (ID: 66090201)
- Connected to the broader key derivation function class with 14 related sitelinks
- Maintains a Freebase identifier for cross-referencing in knowledge graphs

## Body
### Technical Classification
Crypt is specifically classified as a key derivation function, which is a cryptographic primitive that takes a secret value (such as a password) and produces one or more secret keys through a deterministic process. This classification places it within the broader family of cryptographic functions used for secure key management.

### Documentation and Availability
The crypt function is documented across multiple language editions of Wikipedia, including English, Russian, and Ukrainian, indicating its widespread use and recognition in the international computing community. This multilingual documentation suggests its importance in various regional computing contexts.

### Academic Recognition
Crypt has been assigned a Microsoft Academic ID (66090201), though this identifier has been discontinued. This academic recognition indicates that the function has been studied and referenced in scholarly contexts, particularly in computer science and cryptography research.

### Knowledge Graph Integration
The function is integrated into knowledge graphs through its Freebase ID (/m/0r4ksr1) and its relationship to the key derivation function class. This integration allows for semantic connections between crypt and related cryptographic concepts, facilitating better understanding and discovery of related technologies.

### Relationship to Password Security
As a password hash function, crypt plays a vital role in password security by transforming user passwords into secure key representations. This transformation is essential for protecting stored passwords and ensuring that even if password databases are compromised, the original passwords remain protected through the one-way nature of the hashing process.

## References

1. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)