$391.5 million restitution from @[email protected] for data privacy lawsuit, #cryptographically signing ZIP files, and a new privacy attack #exploiting every WiFi device in your building. Listen to Steve Gibson and @leo for more topics like this on Security Now:
https://twit.tv/shows/security-now/episodes/898?autostart=false

if round function is a #cryptographically secure #pseudorandom function, Ki as seed, then 3 rounds make block cipher a #pseudorandom #permutation PP ,4 rounds make it a "strong" PP ( remains pseudorandom even to an adversary who gets #oracle access to its inverse permutation)