{"id":68485,"date":"2023-06-30T14:58:03","date_gmt":"2023-06-30T06:58:03","guid":{"rendered":"https:\/\/version-2.com\/?p=68485"},"modified":"2023-06-30T15:05:08","modified_gmt":"2023-06-30T07:05:08","slug":"aes-encryption-how-does-it-safeguard-your-data","status":"publish","type":"post","link":"https:\/\/version-2.com\/en\/2023\/06\/aes-encryption-how-does-it-safeguard-your-data\/","title":{"rendered":"AES encryption: how does it safeguard your data?"},"content":{"rendered":"
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Today, the primary method of information storage is digital, which is something hackers are well aware of. Consequently, threats targeting data security have increased relatively quickly, with businesses becoming the primary targets. This sets forth a precedent to balance data availability, ease of use, and security, enabling them to carry out daily operations while ensuring the confidentiality of sensitive data.<\/p>

Businesses must ensure that they can perform their daily operations smoothly while guaranteeing data confidentiality. Advanced Encryption Standard (AES)<\/strong> was developed to address this challenge \u2014 an encryption algorithm<\/strong> that has become the de facto standard for protecting electronic data. In this article, we’ll explore what the AES encryption algorithm is, how it works, its features, and its security capabilities. We’ll also compare the Advanced Encryption Standard to other encryption methods.<\/p>

What is AES?<\/h2>

AES stands for Advanced Encryption Standard, a specification for the encryption of electronic data<\/strong>. It was established by the United States National Institute of Standards and Technology (NIST) in 2001. Since then, it has become a widely used algorithm for symmetric key encryption.<\/p>

The advanced encryption algorithm is based on the Rijndael cipher developed by two Belgian cryptographers, Joan Daemen <\/strong>and Vincent Rijmen<\/strong>, who submitted it to the NIST during the Advanced Encryption Standard selection process. As a block cipher, AES encrypts data in fixed-size blocks, so 128, 192, or 256 bits in length<\/strong>. This makes up various AES designations like AES-128, AES-192, and AES-256<\/strong>.<\/p>

Advanced Encryption Standard has been extensively tested and is considered secure against all known practical attacks (like brute forcing) when used properly. For this reason, it’s used worldwide in various applications, including secure communications, file transfers, and storage.<\/p>

AES implementation types<\/h2>

AES can be implemented using different modes of operation. They introduce new ways to apply symmetric block cipher to encrypt or decrypt data. The choice of implementation depends on the specific requirements of the application and the desired security properties. Here are its most commonly used types:<\/p>

ECB (Electronic Codebook)<\/strong>. Divides plaintext into blocks; each block is encrypted independently using the AES algorithm. This mode is simple and parallelizable, but it is unsuitable for encrypting large amounts of data or when there is repetitive data, as it can lead to patterns in the ciphertext.<\/p>

CBC (Cipher Block Chaining)<\/strong>. XORs each plaintext block with the previous ciphertext block before encryption. This introduces a dependency between blocks, making it more secure than ECB against pattern analysis attacks. Initialization Vector (IV) is used to encrypt the first block, and the ciphertext of each block is used as the IV for the next block.<\/p>

CTR (Counter)<\/strong>. Converts the block cipher AES into a stream cipher. It uses a counter value combined with a unique nonce (number used once) as the input to the AES algorithm. The resulting output is XORed with the plaintext to produce the ciphertext. CTR mode allows parallel encryption and decryption and is commonly used in scenarios where random access to encrypted data is required.<\/p>

OFB (Output Feedback)<\/strong>. Also converts AES into a stream cipher. It generates a keystream by encrypting an IV with AES and then XORs the keystream with the plaintext to produce the ciphertext. Unlike CTR, OFB requires sequential encryption and decryption, as errors in transmission can propagate to subsequent blocks.<\/p>

CFB (Cipher Feedback)<\/strong>. Very similar to OFB but operates on smaller units, typically individual bytes. It encrypts the IV and XORs the resulting output with the plaintext to produce the ciphertext. The keystream is then generated by encrypting the previous ciphertext block. Like OFB, CFB requires sequential processing.<\/p>

GCM (Galois\/Counter Mode)<\/strong>. Combines AES encryption with a cryptographic hash function called GHASH. It provides both confidentiality and integrity of the data. GCM mode is commonly used in network communication protocols and is suitable for parallel processing.<\/p>

Remember that these are just a few examples of AES encryption modes. The best choice for a specific use case will depend on factors like security requirements, performance, parallelizability, and specific needs of the application.<\/p>

How AES encryption works<\/h2>

Fixed-length blocks of data (so 128, 192, or 256 bits) are transformed as a series of substitutions, permutations, and mixing operations are applied to encrypt and decrypt the data. As AES encryption uses a symmetric key, the same one is used for encryption and decryption.<\/p>

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The process occurs in stages:<\/picture><\/p><\/div>

1. Key expansion<\/strong>. The initial key is expanded into 44, 52, or 60 32-bit words for 128, 192, and 256-bit keys. These expanded words are used in the subsequent rounds of AES encryption. The key expansion process involves generating additional round keys from the initial key.<\/p>

2. Initial round<\/strong>. The input or plaintext block is mixed with the initial round key before proceeding to the main rounds of AES encryption.<\/p>

3. Each round of AES encryption consists of four transformations<\/strong>:<\/p>