Distinguishing Attack on SN3 Stream Cipher

SN3 is a synchronous stream cipher uses keys up to 768-byte. The cipher is constructed as an array base generator in which each key stream word can be considered as a linear combination of some array contents. While the cipher has not been analyzed yet, we show that there is a significance correlation between output key streams and by using this result we mount a distinguishing attack on SN3 stream cipher with having about 228.2 words of the output sequence.