As for AES 512, maybe you're refering to a 512 bit key that gets split into two 256 bit parts for LUKS in aes-xts-plain mode? The man page of cryptsetup states: For XTS mode you can optionally set a key size of 512 bits with the -s option. Key size for XTS mode is …

Advanced Encryption Standard(AES) is a symmetric encryption algorithm. AES is the industry standard as of now as it allows 128 bit, 192 bit and 256 bit encryption.Symmetric encryption is very fast as compared to asymmetric encryption and are used in systems such as database system. Advanced Encryption Standard: Understanding AES 256 Jul 29, 2019 Power dissipation and area comparison of 512-bit and 1024

128-bit AES encryption is highly robust, nearly impossible to crack and is still the strong default choice for all traditional commercial applications. Hackers stand no reasonable chance of defeating 128-bit AES encryption and it is accepted as providing a very high level of security.

Sep 08, 2014 AES vs. RSA Encryption: What Are the Differences

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Oct 13, 2017 คู่มือขั้นสูงสำหรับ Advanced Encryption Standard (AES) โดยรวมทั้งหมดมี block ciphers สามประเภทที่ AES ประกอบด้วย AES-128, AES-192 และ AES-256 แต่ละ AES เข้ารหัสจะเข้ารหัสและถอดรหัสข้อมูลในบล็อค 128 bits โดยใช้ ALG_ID (Wincrypt.h) - Win32 apps | Microsoft Docs