olemus
(1) varipääsu kasutav rünne
= an active form of wiretapping where the attacker gains access to a system via intervals of inactivity in another user's legitimate connection

(2) kannul sisenemist kasutav rünne
= an attack based on illegal entry by means of tailgating

ülevaateid
https://en.wikipedia.org/wiki/Piggyback_attack

https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.146.3623&rep=rep1&type=pdf