time-success ratio
  
    
      aja ja edu suhe
olemus
ründe tõhususe mõõt krüptograafias, esitatakse jagatisena \(\frac{t}{\delta}\), kus 
 \(t\) on aeg plokkšifri operatsioonide arvuna
 \(\delta\) on edu, vt edu (2)
mida väiksem on aja ja edu suhe, seda tõhusam on rünne
= a measure of the attack efficiency in cryptography:
the quotient \(\frac{t}{\delta}\), where 
 \(t\) is time, i.e. the number of block cypher operations
 \(\delta\) is some measure of success