The actual term was first used by PERSON@1 -LRB- Feistel NUMBER@1 -RRB- , although the concept dates back to at least PERSON@2 's diffusion .

The term avalanche effect was first used by PERSON@1 -LRB- Feistel NUMBER@1 -RRB- , although the concept was identified by PERSON@2 's property of confusion .
