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。

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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。

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The method is called DigestSearch because it USES the unique digest (one-way hash) value to represent a search word.

该方法称作DigestSearch是因为它使用惟一摘要(单向散列)值来表示一个搜索字。

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Memories are not held in their entirety in the brain like old movie clips, but are maintained as a kind of chemical residue of the original perception, which could be thought of as a hash value or remainder, but not a one-way algorithm at all.

FORBES: Density Of Meaning: Creation As The Flip Side Of Memory