---
title: "Discussion on \"Symmetric key algorithm - (2) AES\" | Hashnode"
description: "Discussion on \"Symmetric key algorithm - (2) AES\". AES is a symmetric key encryption algorithm that has replaced DES due to its higher security and efficiency.\n1. Block Cipher Structure\n\nAES encrypts fixed-size 128-bit blocks of data.\n\nUnlike DES (which uses a Feistel structure), AES uses a substitut..."
url: "https://hashnode.com/posts/symmetric-key-algorithm-2-aes/67d80793b4d064fabafc8b99"
---

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# [Symmetric key algorithm - (2) AES](https://psk-study.hashnode.dev/symmetric-key-algorithm-2-aes?utm_source=hashnode&utm_medium=feed)

AES is a symmetric key encryption algorithm that has replaced DES due to its higher security and efficiency. 1. Block Cipher Structure AES encrypts fixed-size 128-bit blocks of data. Unlike DES (which uses a Feistel structure), AES uses a substitut...

Mar 17, 2025 · 3 min read · psk-study.hashnode.dev  
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