What do you mean by one way property in hash function?

 What do you mean by one way property in hash function?

The "one-way property" in the context of hash functions refers to the computational property where it is easy to calculate the hash value of a given input but it is extremely difficult or practically impossible to reverse-engineer the original input from its hash value. .

In simple terms, a hash function is designed to efficiently convert an input (or message) into a fixed-sized string of characters, called a hash value or hash code. This process should be quick and straightforward.

However, given only the hash value produced by the function, it should be computationally impossible (ideally impossible within a reasonable time) to find the original input that produced that specific hash.

This property is important for cryptographic security. For example, in password storage, a system may store a hash of the password instead of the password itself. When a user tries to log in, the system hashes the entered password and compares it with the stored hash. If someone gains access to the stored hash, it will be very difficult for him to get the hash back to the original password.

Hash functions exhibiting the one-way property should make it highly impractical to generate the original input by brute force or some algorithm compared to trying every possible input until a match is found. This property ensures data security, integrity, and confidentiality in various applications in computer science and cryptography.