C-32 D-64 E-128 F-256

Given the sequence position n starting at n=0 for C, n=1 for D, n=2 for E, n=3 for F:

They are all .

Thus, the sequence (32,64,128,256 bytes) maps exactly to (256,512,1024,2048 bits) — the classic RSA key length progression. c-32 d-64 e-128 f-256