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  • encryption - How do substution-permutation networks work . . .
    He wanted to develop a hard-wired device he could safely use for both encryption and decryption and which would have all the great features provided by SP network (avalanche effect, non-linearity, ) You cannot use the same device for both encryption and decryption with basic SP network decribed on page 3 of your slides
  • What is the diffrence between Feistel networks and SPN?
    Although a Feistel network that uses S-boxes (such as DES) is quite similar to SP networks, there are some differences that make either this or that more applicable in certain situations For a given amount of confusion and diffusion, an SP network has more "inherent parallelism" 1 and so — given a CPU with many execution units — can be
  • block cipher - Substitution-Permutation Network (SPN) Example . . .
    Stack Exchange Network Stack Exchange network consists of 183 Q A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers Visit Stack Exchange
  • arx - Alternative block cipher design paradigms to SP-networks and . . .
    It also lists "generalized Feistel network" and "generalized Feistel structure", but I think those can be relabeled as "Feistel-like" And looking back on Speck, it seems like it cannot be classified as either a Feistel-like cipher or an SP-network So, my questions are:
  • spn - Substitution-permutation network visualizer - Cryptography Stack . . .
    However, I can't do that very well as I can't see the network itself Basically, I wonder if there is a software which generates a SPN network automatically given round permutations S boxes and presents it visually This would make the analysis much simpler
  • block cipher - Is AES strictly speaking a SP network? - Cryptography . . .
    I've read that AES is a SP network However, when reading about P-boxes in SPNs they say that they simply shuffle bits around In AES the ShiftRows step is definitely shuffling bits around, but MixColumns step is not a bit permutation Does this make AES something more than a SP network, or can the definition of a P-box simply be stretched a bit?
  • Can we design a block cipher based on SP-network without loss of E D . . .
    I understand what SP-network (Substitution-Permutation Network) and Feistel Network look like And those ciphers based on Feistel (e g DES) often achieve so called E D similarity, which indicates that the cipher itself follows the same pattern during either encryption or decryption
  • Why is AES not a Feistel cipher? - Cryptography Stack Exchange
    Read the links in Reid's answer and try to memorize the schematics and what a Feistel network looks like That's very different from a simple sub-perm network (link also in Reid's answer) A Feistel cipher is a cipher that uses a Feistel structure in its design - AES does not $\endgroup$ –





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