Explain the difference between CFB and OFB modes of block cipher operation. What mode is more reliable? Why?

Hints:

IV CM- O-1 SISI register SHughter Srgher 64- 64 IV Shinger sbih X64 Shiny register 64-bitssets Shift register sets X64 164 X64 Encrypt K Encrypt 464 (64 K-Encrypt 26 K K- 164 KEncrypt Xos card 64-bits - Encrypt 164 Select Select L card Encrypt 164 Select scard sbits 64-bits YE Sect bits 6- Dhcard 64-bit Select Discard P PM P PM LAB A C CM C2 (a) Encryption C Cz (a) Encryption IV -4 Sain register ON-1 IV Shift register Shirogister Shergher H- 64 Encrypt 164 64 Encrypt 864 SH regho 1-2 bit be 264 Decrypt 164 Shift register 64-bit XE K K K 484 164 K KEncrypt 164 KEncrypt YA Decrypt 194 Select bits Deward card Discard sis Shoes Select bits X Discard bits Select bits S Deward 64-bits Select bits Deward 64-bits | AC CM P PM P2 (b) Decryption Pi PM Figure 3.13 s-bit Cipher Feedback (CFB) Mode P2 (b) Decryption Figure 3.14 s-bit Output Feedback (OFB) Mode