Propiedad de
una función, tal que es computacionalmente imposible construir distintos
mensajes de entrada que den la misma salida (ISO/IEC ISO-10118-1)
[Ribagorda:1997]
A hash-function satisfying
the following property: it is computationally infeasible to find any two
distinct inputs which map to the same output.
NOTE. Computational
feasibility depends on the specific security requirements and environment.
[ISO-10118-1:2000]