  The hash function is an important branch of cryptology. Controlled quantum
walk based hash function is a kind of novel hash function, which is safe,
flexible, high-efficient, and compatible. All existing controlled quantum walk
based hash functions are controlled by one bit message in each step. To process
message in batch amounts, in this paper, controlled alternate quantum walk
based block hash function is presented by using the time-position-dependent
controlled quantum walks on complete graphs with self-loops. The presented hash
function accelerate the hash processing dramatically, so it is more
high-efficient.
