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  2. Advanced Encryption Standard - Wikipedia

    en.wikipedia.org/wiki/Advanced_Encryption_Standard

    Despite being impractical, theoretical breaks can sometimes provide insight into vulnerability patterns. The largest successful publicly known brute-force attack against a widely implemented block-cipher encryption algorithm was against a 64-bit RC5 key by distributed.net in 2006. [16]

  3. Blowfish (cipher) - Wikipedia

    en.wikipedia.org/wiki/Blowfish_(cipher)

    Blowfish has a 64-bit block size and a variable key length from 32 bits up to 448 bits. [5] It is a 16-round Feistel cipher and uses large key-dependent S-boxes.In structure it resembles CAST-128, which uses fixed S-boxes.

  4. 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.

  5. Secure Hash Algorithms - Wikipedia

    en.wikipedia.org/wiki/Secure_Hash_Algorithms

    They differ in the word size; SHA-256 uses 32-bit words where SHA-512 uses 64-bit words. There are also truncated versions of each standard, known as SHA-224, SHA-384, SHA-512/224 and SHA-512/256. These were also designed by the NSA. SHA-3: A hash function formerly called Keccak, chosen in 2012 after a public competition among non-NSA designers ...

  6. RC5 - Wikipedia

    en.wikipedia.org/wiki/RC5

    Distributed.net has brute-forced RC5 messages encrypted with 56-bit and 64-bit keys and has been working on cracking a 72-bit key since November 3, 2002. [4] As of July 26, 2023, 10.409% of the keyspace has been searched and based on the rate recorded that day, it would take a little more than 59 years to complete 100% of the keyspace. [ 5 ]

  7. Galois/Counter Mode - Wikipedia

    en.wikipedia.org/wiki/Galois/Counter_Mode

    Impressive performance results are published for GCM on a number of platforms. Käsper and Schwabe described a "Faster and Timing-Attack Resistant AES-GCM" [15] that achieves 10.68 cycles per byte AES-GCM authenticated encryption on 64-bit Intel processors. Dai et al. report 3.5 cycles per byte for the same algorithm when using Intel's AES-NI ...

  8. Data Encryption Standard - Wikipedia

    en.wikipedia.org/wiki/Data_Encryption_Standard

    The Data Encryption Standard (DES / ˌ d iː ˌ iː ˈ ɛ s, d ɛ z /) is a symmetric-key algorithm for the encryption of digital data. Although its short key length of 56 bits makes it too insecure for modern applications, it has been highly influential in the advancement of cryptography .

  9. International Data Encryption Algorithm - Wikipedia

    en.wikipedia.org/wiki/International_Data...

    IDEA operates on 64-bit blocks using a 128-bit key and consists of a series of 8 identical transformations (a round, see the illustration) and an output transformation (the half-round). The processes for encryption and decryption are similar.