What are the security features of hashing algorithms in C++11?

What are the security features of hashing algorithms in C++11?

C++11 offers several hashing algorithms, including std::hash, which provides a way to generate hash values for various data types. Security features depend on the algorithm used; for example, SHA-256 is more secure than simpler algorithms.

How does std::hash compare to SHA-256 in terms of security?

std::hash is designed for performance and is not cryptographically secure, making it suitable for hash tables. In contrast, SHA-256 is a cryptographic hash function that provides strong security against collisions and pre-image attacks.

Can you explain what a collision is in hashing?

A collision occurs when two different inputs produce the same hash output. This is a critical concern in cryptographic hashing, as it can compromise data integrity.

What are some best practices for using hashing algorithms securely?

Best practices include using well-established algorithms like SHA-256, salting inputs to prevent rainbow table attacks, and regularly updating your hashing methods to counteract vulnerabilities.