Sorry for being pedantic but it's Feistel and not Fiestal.
Aside from that thanks heaps for creating a Python implementation of the Speck Cipher. I am currently playing with Sigfox transmissions and given the small size of the data payload of at most 12 bytes (i.e. 96 bits) Speck/Simon are the only ciphers that are feasible to use. In fact, I mainly raised this issue to say thank you 👍
Sorry for being pedantic but it's Feistel and not Fiestal.
Aside from that thanks heaps for creating a Python implementation of the Speck Cipher. I am currently playing with Sigfox transmissions and given the small size of the data payload of at most 12 bytes (i.e. 96 bits) Speck/Simon are the only ciphers that are feasible to use. In fact, I mainly raised this issue to say thank you 👍
Markus