Complex sentence: With the invention of radio, much of military communications went wireless, allowing the possiblity of enemy interception much more readily than tapping into a landline, increasing the need to protect communications using sufficiently strong cryptography.
Split into simpler sentences: With the invention of radio, much of military communications went wireless, allowing the possiblity of enemy interception much more readily than tapping into a landline. This increased the need to protect communications using sufficiently strong cryptography.