How to upgrade communications
High communication efficiency means that there is minimal delay when tactics are assigned, and coordinated activity are less likely to run into trouble.
10: Digital mobile phones, instant messaging
7-9: Cell phone and email
4-6: Telephone and telegram
1-3: Postal mail
0: Face to face only
Communication security is also crucial to prevent adversaries to disrupt or gain access to it.
10: strong crypto used on all electronic and voice communication, hard drives regularly swapped and reformatted, codes used for all written messages, strict protocol observed for all meetings. Cell-like organization structure where no one can betray more than 2-3 others. Extensive use of code names for people
7-9: most communication encrypted, good password security, written messages coded, strategy meetings staked out and kept small
4-6: unsecured voice and email, hard drive passwords rarely changed, only simple codes, face-to-face minimal variation
1-3: Wide use of email lists, no encoding written communication, face-to-face
0: No measures taken
Erik van der Zanden

Picture by Telegram