olemus
Wiktionary:
2. (idiomatic) something used as a way to progress to something or somewhere else

infoturbes: jadaründe esimese sammuga loodud platsdarm edasisteks rünneteks

ülevaateid
http://publish.illinois.edu/science-of-security-lablet/files/2014/06/Modeling-and-Anaylysis-of-Stepping-Stone-Attacks.pdf

http://intelli-sec.cs.berkeley.edu/papers/stepstone.pdf

https://www.cs.utexas.edu/~yzhang/papers/stepping-sec00.pdf

http://acsp.ece.cornell.edu/papers/HeTong06SP.pdf