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

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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. ...
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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 ...