S. ghter Explain the difference between CFB and OFB modes of block cipher operation. What mode is more reliable? Why? CM- IV Shinger Stregher Sangh K Encrypt Encrypt K-Encrypt Schul Lucard 44 Scheel card School Descard PN Cy (a) Encryption CM IV SAR 164 regher K K- K Encrypt 764 Encrypt 164 Seri card Decrypt 464 Schert Escard 4. Select P2 (b) Decryption Figure 3.13 s-bit Cipher Feedback (CFB) Mode IV re ST 64 K Encrypt K Encrypt Encrypt Schut MAS Dhard card Select hard P2 Pw Le CL (a) Eneryption O-1 IV Shire 61 - Abis Shrughter 64 K K KEncrypt 164 Decrypt Enerpl 154 hard 6 Select hard Mts hard C PM P2 (b) Decryption Figure 3.14 s-bit Output Feedback (OFB) Mode