IntroductionTrees are trees too. The Chinese translation is also Merkel tree or Merkel tree. Because this is a tree built with hash values, and all nodes of the tree store hash values, it is also called a hash. Tree, the English name is Hash Tree, so what exactly is a Merkel tree? What are the applications?This article will introduce you in detail
What is a Merkle tree?
A tree, also known as a hash tree, is a data structure widely used in computer science and cryptography. It efficiently and securely validates the contents of large data structures. The concept of the Merkel tree was proposed by Ralf Merkel in 1979 and named after him.
The basic structure of the tree is a binary tree, where each leaf node is marked with the hash value of the data block, and each non-leaf node is marked with the hash value of its child node. The hash of the value. The hash value is usually calculated using a cryptographic hash function such as SHA-2. The top node of the tree is called the root node, also known as the top hash, root hash, or main hash. An example looks like this:
The main use of trees is data validation and synchronization. By comparing the root hashes of two trees, you can quickly determine whether two data sets are the same. If they are different, the hash values of the child nodes can be compared to find out which specific data blocks are different, thereby achieving incremental updates. This saves network bandwidth and storage space, and improves efficiency and security.
What are the applications of trees?
Trees are widely used in many fields and applications, such as:
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