Welche Verschlüsselung AES?
Der öffentliche Verschlüsselungsalgorithmus Advanced Encryption Standard (AES) ist eines der meistgenutzten und sichersten Verschlüsselungsverfahren. Es wird beispielsweise in den USA für Regierungsdokumente der höchsten Geheimhaltungsstufe verwendet.
Wie sicher ist AES-Verschlüsselung?
Da es sich bei AES-256 um ein symmetrisches Verschlüsselungsverfahren handelt, sind die einzelnen Schlüssel zum Ver- und Entschlüsseln identisch. Der Wert 256 steht dabei für die Schlüssellänge, in diesem Fall 256 Bit. Mit dieser Länge gilt AES-256 als ein besonders sicherer Standard.
How many rounds are there in a 128 bit AES cipher?
The key size used for an AES cipher specifies the number of transformation rounds that convert the input, called the plaintext, into the final output, called the ciphertext. The number of rounds are as follows: 10 rounds for 128-bit keys. 12 rounds for 192-bit keys.
What is the computational complexity of an AES 128 key attack?
Attacks have been published that are computationally faster than a full brute-force attack, though none as of 2013 are computationally feasible. For AES-128, the key can be recovered with a computational complexity of 2 126.1 using the biclique attack.
What is the maximum key length required for AES?
TOP SECRET information will require use of either the 192 or 256 key lengths. The implementation of AES in products intended to protect national security systems and/or information must be reviewed and certified by NSA prior to their acquisition and use.
What is the difference between AES and Rijndael?
AES is a variant of Rijndael, with a fixed block size of 128 bits, and a key size of 128, 192, or 256 bits. By contrast, Rijndael per se is specified with block and key sizes that may be any multiple of 32 bits, with a minimum of 128 and a maximum of 256 bits. AES operates on a 4 × 4 column-major order array of bytes, termed the state.