From: http://blog.csdn.net/zxycode007/article/details/6999984
Hash list, which is based onQuick accessIs also a typical"Space Change Time. As the name suggests, this data structure can be understood as a linear table, but the elements in it are not
Reprinted from: http://blog.csdn.net/zxycode007/article/details/6999984
Hash list, which is based onQuick accessIs also a typical"Space Change Time. As the name suggests, this data structure can be understood as a linear table, but the elements in
Hash table, which is based on the high-speed access point of view design, but also a typical " space-time " approach. As the name implies, the data structure can be understood as a linear table, but the elements are not tightly arranged, but there
The hash table, which is based on the fast access angle design, is also a typical " space-time " approach. As the name implies, the data structure can be understood as a linear table, but the elements are not tightly arranged, but there may be
Hash table, which is based on the high-speed access point of view design, but also a typical " space-time " approach. As the name implies, the data structure can be understood as a linear table, but the elements are not tightly arranged, but there
Hash table, also known as the hash table, is based on a fast access point of view design, but also a typical " space-time " approach. As the name implies, the data structure can be understood as a linear table, but the elements are not tightly
Hash
Hash, the general translation to do "hash", there is a direct transliteration of "hash", is the arbitrary length of the input (also known as pre-mapping, pre-image), through the hash algorithm, transformed into a fixed-length output,
Instance
Computes the SHA-1 hash of the string "Hello":
Definition and usage
The SHA1 () function computes the SHA-1 hash of the string.
The SHA1 () function uses the United States Secure Hash algorithm 1.
Explanation from RFC 3174-the US Secure
a hash table, also known as a hash table, is a data structure that is accessed directly from a key value. That is, it accesses records by mapping key code values to a location in the table to speed up lookups. This mapping function is called a hash
This paper mainly describes the process of computing the Information digest using the SHA1 algorithm.Security System (0)--encryption and decryption algorithm, message digest, message authentication technology, digital signature and public key
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