{"id":10240,"date":"2025-12-11T15:03:16","date_gmt":"2025-12-11T14:03:16","guid":{"rendered":"https:\/\/pcihispano.com\/?p=10240"},"modified":"2026-05-06T19:13:14","modified_gmt":"2026-05-06T17:13:14","slug":"la-importancia-de-los-modos-de-cifrado-en-la-criptografia","status":"publish","type":"post","link":"https:\/\/www.pcihispano.com\/en\/la-importancia-de-los-modos-de-cifrado-en-la-criptografia\/","title":{"rendered":"The Importance of Encryption Modes in Cryptography"},"content":{"rendered":"

When using encryption, a robust algorithm and an acceptable key length is not enough. There are two other very important parameters that are often forgotten: the encryption mode and parameterization of the initialization vector (Initialization Vector<\/em>, IV). These values are critical when protecting data with a fixed length, such as a personal identification number (Personal Account Number<\/em> \u2013 PAN).<\/span><\/p>\n

Data Encryption and the Problem with Pattern Generation<\/h3>\n

The algorithms of Block Encryption<\/a>\u00a0y Flow<\/a> (employees to encrypt fixed and variable length data, respectively) work in a very simple way: receive the data to be protected and the key to encrypt\/decrypt it, and employ a routine that changes the order of the data (encryption algorithm). This set is called a cryptosystem<\/a>:<\/p>\n

\"\"<\/p>\n

However, This model has a critical vulnerability: when running encryption routines on a dataset limited in size and relatively similar, using the same algorithm and the same key, patterns can be generated<\/span> which can be used as part of an attack (cryptanalysis<\/a>). In the following example, a encryption routine<\/a> of a block of five consecutive NAP numbers:<\/p>\n