Yeah, Keccak-224 specified c=448. I was trying to simplify things by sticking to Keccak at 256 and 512 bit fixed output lengths, which specified c=512 and c=102

Yeah, Keccak-224 specified c=448. I was trying to simplify things by sticking to Keccak at 256 and 512 bit fixed output lengths, which specified c=512 and c=1024 respectively.