When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. Advanced Encryption Standard - Wikipedia

    en.wikipedia.org/wiki/Advanced_Encryption_Standard

    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. 14 rounds for 256-bit keys.

  3. Block size (cryptography) - Wikipedia

    en.wikipedia.org/wiki/Block_size_(cryptography)

    The extra block sizes were not adopted by the AES standard. Many block ciphers, such as RC5, support a variable block size. The Luby-Rackoff construction and the Outerbridge construction can both increase the effective block size of a cipher. Joan Daemen's 3-Way and BaseKing have unusual block sizes of 96 and 192 bits, respectively.

  4. Galois/Counter Mode - Wikipedia

    en.wikipedia.org/wiki/Galois/Counter_Mode

    GCM uses a block cipher with block size 128 bits (commonly AES-128) operated in counter mode for encryption, and uses arithmetic in the Galois field GF(2 128) to compute the authentication tag; hence the name. Galois Message Authentication Code (GMAC) is an authentication-only variant of the GCM which can form an incremental message ...

  5. Block cipher - Wikipedia

    en.wikipedia.org/wiki/Block_cipher

    It won the 5-year public competition to become the AES (Advanced Encryption Standard). Adopted by NIST in 2001, AES has a fixed block size of 128 bits and a key size of 128, 192, or 256 bits, whereas Rijndael can be specified with block and key sizes in any multiple of 32 bits, with a minimum of 128 bits.

  6. Advanced Encryption Standard process - Wikipedia

    en.wikipedia.org/wiki/Advanced_Encryption...

    The Advanced Encryption Standard ... The algorithms were all to be block ciphers, supporting a block size of 128 bits and key sizes of 128, 192, and 256 bits.

  7. AES key schedule - Wikipedia

    en.wikipedia.org/wiki/AES_key_schedule

    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.

  8. AES implementations - Wikipedia

    en.wikipedia.org/wiki/AES_implementations

    GPG, GPL-licensed, includes AES, AES-192, and AES-256 as options. IPsec; IronKey Uses AES 128-bit and 256-bit CBC-mode hardware encryption; KeePass Password Safe; LastPass [7] Linux kernel's Crypto API, now exposed to userspace; NetLib Encryptionizer supports AES 128/256 in CBC, ECB and CTR modes for file and folder encryption on the Windows ...

  9. Key size - Wikipedia

    en.wikipedia.org/wiki/Key_size

    In cryptography, key size or key length refers to the number of bits in a key used by a cryptographic algorithm (such as a cipher).. Key length defines the upper-bound on an algorithm's security (i.e. a logarithmic measure of the fastest known attack against an algorithm), because the security of all algorithms can be violated by brute-force attacks.