About: Ladder-DES

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In cryptography, Ladder-DES is a block cipher designed in 1994 by Terry Ritter. It is a 4-round Feistel cipher with a block size of 128 bits, using DES as the round function. It has no actual key schedule, so the total key size is 4×56=224 bits.

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  • In cryptography, Ladder-DES is a block cipher designed in 1994 by Terry Ritter. It is a 4-round Feistel cipher with a block size of 128 bits, using DES as the round function. It has no actual key schedule, so the total key size is 4×56=224 bits. In 1997, Eli Biham found two forms of cryptanalysis for Ladder-DES that depend on the birthday paradox; the key is deduced from the presence or absence of collisions, plaintexts that give equal intermediate values in the encryption process. He presented both a chosen-plaintext attack and a known-plaintext attack; each uses about 236 plaintexts and 290 work, but the known-plaintext attack requires much more memory. (en)
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  • 2215 (xsd:nonNegativeInteger)
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  • 1084903202 (xsd:integer)
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dbp:blockSize
  • 128 (xsd:integer)
dbp:cryptanalysis
  • Eli Biham's attacks require 236 plaintext-ciphertext pairs (en)
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dbp:designers
  • Terry Ritter (en)
dbp:keySize
  • 224 (xsd:integer)
dbp:name
  • Ladder-DES (en)
dbp:publishDate
  • 1994-02-22 (xsd:date)
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dbp:rounds
  • 4 (xsd:integer)
dbp:structure
  • Nested Feistel network (en)
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  • In cryptography, Ladder-DES is a block cipher designed in 1994 by Terry Ritter. It is a 4-round Feistel cipher with a block size of 128 bits, using DES as the round function. It has no actual key schedule, so the total key size is 4×56=224 bits. (en)
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  • Ladder-DES (en)
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