2018 block chain heard, Cong from this contract to the intelligence; from monetary encryption to block chain; from Bitcoin wallet to ...... Today we'll learn some new knowledge.
1. What hashing algorithm?
Hash algorithm called hash algorithm is to map the binary values of arbitrary length binary value of a short fixed length, small binary value called the hash value. Its principle is very simple, is to convert some transaction information into a fixed-length string.
This substrings have some features:
1. The same information is also the same string. 2. The information does not affect similar to the same string. 3. can generate a myriad of information, but the type of string is certain, it is irreversible.
Let's take an example to understand this: if we want to search for a picture, in the absence of manual annotation of the situation, you want to map to a huge library and search map is a huge and difficult workload.