4. Norwegian / Norsk | 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. Czech / Čeština c) 2 or 3 Russian / Русский
Chinese Simplified / 简体中文
) View Answer, 7. One key bundle shall not be used to apply cryptographic protection (e.g., encrypt) more than , In practical attack conditions, such huge amounts of known or chosen plaintexts cannot really be obtained, hence differential and linear cryptanalysis do not really impact the actual security of DES; the weakest point is the short key. As a side note, differential analysis was known to the DES designers, and DES was hardened against it (hence the "good score" of 247).
While the government and industry standards abbreviate the algorithm's name as TDES (Triple DES) and TDEA (Triple Data Encryption Algorithm), RFC 1851 referred to it as 3DES from the time it first promulgated the idea, and this namesake has since come into wide use by most vendors, users, and cryptographers.. 2
Chinese Simplified / 简体中文  Practical Sweet32 attack on 3DES-based cipher-suites in TLS required 20 i a) True , each of 56 bits (excluding parity bits).
, such that
K The meet-in-the-middle attack (MITM), a known plaintext attack, is a generic space–time tradeoff cryptographic attack against encryption schemes that rely on performing multiple encryption operations in sequence.The MITM attack is the primary reason why Double DES is not used and why a Triple DES key (168-bit) can be bruteforced by an attacker with 2 56 space and 2 112 operations.
k An upper bound of the memory complexity of MD-MITM is then. b f ,
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