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The Advanced Encryption Standard uses a key schedule to expand a short key into a number of separate round keys. The three AES variants have a different number of rounds. Each variant requires a separate 128-bit round key for each round plus one more. [note 1] The key schedule produces the needed round keys from the initial key.
AES-NI (or the Intel Advanced Encryption Standard New Instructions; AES-NI) was the first major implementation. AES-NI is an extension to the x86 instruction set architecture for microprocessors from Intel and AMD proposed by Intel in March 2008.
KeyExpansion – round keys are derived from the cipher key using the AES key schedule. AES requires a separate 128-bit round key block for each round plus one more. Initial round key addition: AddRoundKey – each byte of the state is combined with a byte of the round key using bitwise xor. 9, 11 or 13 rounds:
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DES has a key schedule in which the 56-bit key is divided into two 28-bit halves; each half is thereafter treated separately. In successive rounds, both halves are rotated left by one or two bits (specified for each round), and then 48 round key bits are selected by Permuted Choice 2 (PC-2) – 24 bits from the left half and 24 from the right ...
SocialDocs file encryption uses AES256 to provide a free-online file encryption tool XFire uses AES-128, AES-192 and AES 256 to encrypt usernames and passwords Certain games and engines, such as the Rockstar Advanced Game Engine used in Grand Theft Auto IV , use AES to encrypt game assets in order to deter hacking in multiplayer.
Data security: Banks are regulated by strict security laws, offering high protection for your financial data through advanced encryption methods, two-factor authentication and fraud detection systems.
Encrypt xmm using 256-bit AES key indicated by handle at m512 and store result in xmm. [c] AESDEC256KL xmm,m512: F3 0F 38 DF /r: Decrypt xmm using 256-bit AES key indicated by handle at m512 and store result in xmm. [c] AESKLE+WIDE_KL AES Wide Key Locker instructions. Perform encryption or decryption for eight 128-bit AES blocks at once ...