The existing one-way hash functions without trapdoor are all iterative algorithms, for instance, MD and SHA family, etc.

现有的无陷门单向散列函数都是迭代算法，例如SHA和MD系列算法等。

youdao

Message digests are secure one-way hash functions that take arbitrary-sized data and output a fixed-length binary hash value.

消息摘要是安全的单向哈希函数，它可以接受任意大小的输入数据，并输出固定长度的二进制哈希值。

youdao

Message Digests are secure, one-way hash functions that convert arbitrary length data into fixed-length check sum / hash code.

消息摘要是一个安全的、单向的哈希函数，把任意长度的数据转化成固定长度的校验和/哈希码。

youdao