What Is The Definition Of Immutable? Immutable means that something is unchanged over time or unable to be changed after creation. Let's explore more in this article.
What Does Immutability Mean In Blockchain?
Immutability is the core defining feature of blockchain. The word 'immutable' means that data cannot be changed or modified by anyone after its creation.
How Blockchain Is Made Immutable?
Blockchain technology uses cryptographic hashing to make it immutable.
Hashing is an encryption method that generates a unique hash value from plaintext input of any length. Regardless of the features of the input they are based on, hashes are always a set length.
Although the hashing algorithm is pretty simple, it is surprisingly hard to reverse. The SHA-256 hashing algorithm, for instance, would produce a 256-bit (64 characters) hexadecimal number like "ebc637e1a3b4902dce844b8c1e1014f11ccb0d4e0240071aae71d453c3c509b5" when applied to the sentence "the quick brown fox jumps over the lazy dog". You will always get the same result if you apply this algorithm to any other string of text (like your password) (a 64-character hexadecimal number).
The hash can be used as a digital signature for data integrity purposes.
When we send some data over the network, we can use its hash value as a fingerprint. If we receive the same data we can compute its hash and verify if it's equal to our original fingerprint. If not, we know that someone tampered with our data while it was in transit.
It's important to note that immutability doesn't guarantee that data can't be altered. Its purpose is to merely ensure that no data or record on a blockchain can be altered without consequences.
What Is The Definition Of Immutable? How Blockchain Is Made Immutable? - Hopefully, this article can help you to get some knowledge.
