block hash的意思|示意

In this way, a node computes a hash of a block; transfers the much smaller signature to the peer node, which also calculates the hash; and then compares them.

这样一来，一个节点可以计算一个块的散列值；将较小的签名转移到对等节点，该节点也可以计算散列值，然后对两者进行比较。

ZFS solves this issue by generating a 32-bit checksum (or 256-bit hash) for metadata for each block written.

ZFS通过为写入的每个块的元数据生成32位校验和(或256位散列)解决了此问题。

The second block of code creates a hash map and populates it with name-value pairs that provide the information required to make a blog post.

第二段代码创建一个hash映射并使用名称-值对填充它，这些名称-值对提供了创作博客文章所需的信息。

MD5 is a "cryptographic" hash function, because it's very difficult to produce a block of information that has a specific given hash value.

MD 5是一个“加密”散列函数，因为生成一个具有特定给定散列值的信息块非常困难。

Part 2 (chapters 4-7) introduces the basic techniques of modern cryptography, including symmetric cryptography (block ciphers, stream ciphers), Hash functions, public-key cryptography technology.

第2部分(第4 ~ 7章)主要介绍现代密码学的基本技术，包括对称密码技术(分组密码、序列密码)、Hash函数、公钥密码技术等。