Covid 19 Update: Given the current global situation, we have paused the delivery of our LiveOnsite courses, but our LiveOnline and OnlineAnytime Packages remain unaffected. Browse over 50 online courses in our course catalogue, or get in touch to register your interest in future LiveOnsite courses when we are able to safely resume in person training.

CFB - Ciphertext Feedback

This is similar to CBC (Cipher Block Chaining) but does not depend on the requirement for a full block before encryption can take place since it uses a register shift to generate the full block of data needed for the encryption operation.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

Explore NetX today with a
free trial.
More Info about NetX