{"id":3233,"date":"2025-10-06T16:09:05","date_gmt":"2025-10-06T14:09:05","guid":{"rendered":"https:\/\/tecnologia.euroinnova.com\/que-es-un-arbol-de-merkle-y-como-funciona\/"},"modified":"2025-10-07T14:52:36","modified_gmt":"2025-10-07T12:52:36","slug":"merkle-tree","status":"publish","type":"post","link":"https:\/\/tecnologia.euroinnova.com\/en\/arbol-de-merkle","title":{"rendered":"What is a Merkle tree and how does it work?"},"content":{"rendered":"

In the field of machine learning and technology blockchain<\/a>, Merkle trees, or Merkle hashes, are essential tools due to their ability to guarantee the integrity and correct preservation of data. In this article, we will explore what a Merkle tree is, what it is used for, and how it works specifically in the context of Bitcoin.<\/p>\n

What is a Merkle tree?<\/h2>\n

A Merkle tree is a data structure used to verify and maintain the integrity of data in a distributed system; in other words, to ensure that the data has not been altered without authorisation. It is named after the researcher Ralph Merkle<\/strong>, who first proposed it in 1979.\u00a0<\/p>\n

Essentially, a Merkle tree is a type of tree binary<\/strong> (that is, each of its nodes has at most two children) in which each leaf node contains a hash<\/a> cryptographic hash of a block of data, and each non-leaf node contains a cryptographic hash derived from the hashes of its child nodes.<\/p>\n

When we talk about leaf node <\/strong>we are referring to those nodes that have no children, whilst the non-leaf nodes<\/strong> are those that do have child nodes. This description is easy to understand if you visualise a tree: non-leaf nodes are the branches of the tree, whilst leaf nodes represent the point where the tree\u2019s trunk ends.<\/p>\n

How does a Merkle tree work in Bitcoin?<\/h2>\n

Let\u2019s explain it in simple terms:\u00a0<\/p>\n

Imagine you have a box full of Bitcoin transactions and you want to make sure that nobody alters them without you realising. A Merkle tree is like a security system for your transactions that uses advanced maths to detect any changes.<\/p>\n

Instead of storing transactions as they are, a special mathematical function called a hash is applied to them. A hash is like a unique fingerprint for each transaction. If even a single character in a transaction is changed, its hash will change completely.<\/strong><\/p>\n

These hashes are organised into a tree in which Each sheet represents a transaction<\/strong> and its corresponding hash. The hashes of the leaves are paired up<\/strong> to create new hashes, which in turn are combined to form even higher-level hashes, until they reach the top of the tree. The final hash at the top is known as the root of the tree or the Merkle root.<\/p>\n

The Merkle root<\/strong> It is like a digital signature that guarantees the integrity of all transactions in the block. If anyone tries to alter a transaction, its hash will change, which in turn will change all the hashes above it, right back to the root.<\/p>\n

To find out whether a transaction has been amended, all you need to do is to know its original hash and the root of the tree. <\/strong>You can reconstruct the path from the transaction hash back to the root by combining hashes at each level. If the final hash matches the root, it means that the transaction has not been tampered with.<\/p>\n

\"Merkle<\/p>\n

How does the Merkle tree differ from other blockchain techniques?<\/h2>\n

The Merkle tree differs from other blockchain techniques in that it consists of a network of interconnected hashes that are highly sensitive to even the slightest modification. Whilst some techniques require check each item individually<\/strong> To detect any unwanted changes or cybersecurity breaches, the Merkle tree allows us to identify them quickly.<\/p>\n

This efficiency is due to the cryptographic nature of the hashes used. A small change to a transaction will result in a completely different hash, spreading through the tree down to the roots.<\/strong><\/p>\n

Therefore, any change to a single transaction will alter the root of the tree, making it much more obvious and easier to identify.
<\/strong><\/p>","protected":false},"excerpt":{"rendered":"

En el campo del aprendizaje autom\u00e1tico (machine learning) y la tecnolog\u00eda blockchain, los \u00e1rboles de Merkle, o hash Merkle, son […]<\/p>\n","protected":false},"author":2,"featured_media":819,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3233","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sin-categorizar"],"acf":[],"_links":{"self":[{"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/posts\/3233","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/comments?post=3233"}],"version-history":[{"count":0,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/posts\/3233\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/media\/819"}],"wp:attachment":[{"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/media?parent=3233"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/categories?post=3233"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/tags?post=3233"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}