A family of lightweight symmetric block-ciphers designed for good performance in hardware with block sizes ranging from 32 to 128 bits and key sizes ranging from 64 to 256 bits.

learn more… | top users | synonyms

6
votes
1answer
442 views

What does NSA mean by 'Analyzable'?

Recently NSA published two new algorithms, Simon and Speck. In the abstract they say The aim of SIMON and SPECK is to fill the need for secure, flexible, and analyzable lightweight block ciphers. ...
3
votes
1answer
695 views

SIMON implementation, decryption issues

I've been trying to implement the new SIMON block cipher in Ruby as a personal challenge. The spec didn't include a pseudocode version of the decryption but I thought I had it figured out. The code I ...
2
votes
2answers
346 views

How should we interpret the cryptanalysis results of SIMON and SPECK?

The NSA recently released SIMON and SPECK light weight block ciphers. Although initial spec release did not have much of cryptanalysis details, two works later appeared providing the cryptanalysis for ...
2
votes
1answer
145 views

SIMONs Cryptoanalysis

I'm reading Cryptanalysis of the SIMON Family of Block Ciphers. In Section 3.1, it says: For SIMON, consider an n-bit input difference $\alpha= x\oplus x'$ to $F$ of Hamming weight one. As the ...