Output size of Salsa20

Question

Salsa12 is in eStream portfolio. How many random bits one can generate in Salsa12 using single key? Is it $512\times 2^{128}$?

score 2 · Accepted Answer · answered Jul 12 '17 at 08:15

2

Salsa20 (and its variants) has 512 bit blocks, a 64-bit counter and a 64-bit nonce. So it can produce $2^{64}$ independent streams consisting of $512 \cdot 2^{64}$ bits each, for a total of $512 \cdot 2^{128}$ bits.

answered Jul 12 '17 at 08:15

CodesInChaos

24,841
2
89
128

Output size of Salsa20

1 Answers1