Can we get the original message from the hash value?

5 Answers. In short, no it is not possible. The whole point of hashing is to take some long string and turn it into a small one. Hashing is destructive and you lose data, so it is irreversible.

Is it possible to decrypt a hash?

How to decrypt a hash? The principle of hashing is not to be reversible, there is no decryption algorithm, that’s why it is used for storing passwords: it is stored encrypted and not unhashable. The only way to decrypt a hash is to know the input data.

How are hashes irreversible?

It is irreversible in the sense that for each input you have exactly one output, but not the other way around. There are multiple inputs that yields the same output. For any given input, there’s a lot (infinite in fact) different inputs that would yield the same hash.

Can you reverse Sha 256?

SHA256 is a hashing function, not an encryption function. Secondly, since SHA256 is not an encryption function, it cannot be decrypted. What you mean is probably reversing it. In that case, SHA256 cannot be reversed because it’s a one-way function.

Is it possible to modify a message without changing the hash?

It is impossible to modify a message without changing the hash. It is impossible to find two different messages with the same hash. There are many different hashing algorithms: MD2, MD5, SHA, and SHA-1 are examples.

Is hashing dependent on original data?

The correct answer is a (i.e. it is repeatable and is dependent on the original data.

Can you decrypt a hash of a message to get the original message explain?

No! A hash may not be reversed, which means it cannot be decrypted. By design a hash algorithm has no inverse, there is no way to get the original message from the hash.

Is it possible to reverse a hash value?

If you only have the original value and the end value, and don’t know what hash function was used, you can’t really reverse it without doing what was said above (going over every possibility). Thanks for contributing an answer to Stack Overflow!

How can I generate a hash from a value?

A hash is a one way process. Simple answer is you can’t. You can however generate tables of values and their hash equivalent and then go searching through those, they’re known as rainbow tables, see here on Wikipedia, but depending on how complicated the input value was these become increasingly unfeasible. You cannot. it is impossible.

Is it possible to get plain text from a hash?

You cannot. it is impossible. That’s actually the point of hashes like this. They are a one way hash. If you’re able to get the plain text back from the hash then the hash isn’t doing its job.