How to develop the hash quiz game system? Hash quiz game system development application details case and source code

　　 The operation result of hash function is hash value guessing , If the two hash values are the same , The microdisk results of these two input values are probably the same in multiple languages , There is also a part that may be different from the rich , This part of the situation is called lucky hash quiz collision . On the contrary, if two hash values are different , Then the original input of these two hash values must be different . For a block of data , Even a little change , The change of the hash value will be very large , This is the ability to resist tampering . The hash value is also a one-way function and is asymmetric , It refers to the irreversible mapping from plaintext to ciphertext , Simply put, there is only the encryption process , There will be no decryption process .

　　 There are many ways to implement the hash algorithm in the hash game , In programming languages, for example , If a function implements a hash algorithm , Then this function will be a hash function , It can be said that a hash function is the implementation of a hash algorithm .

　　 Hash function is also called hash function / Hash algorithm , Hash functions compress messages or data into summaries , Reduce the amount of data so that the format of the data can be fixed , This is a way to create small numbers from any kind of data “ The fingerprint ” Methods , Good hash functions rarely have hash conflicts in their input .

　　 What is computed by the hash algorithm is the hash value . The hash value is irreversible and cannot be inversely calculated back to the original value , In this way, the password can be effectively protected . Because hash values are usually represented by a short string of random letters and numbers , That's in hash tables and data processing , Don't suppress conflicts to differentiate data , Will make database records more difficult to find , So now hash algorithm is also used to encrypt password strings stored in database .

　　 Hash table is a main application of hash function , This will enable the hash table to quickly query data records according to keywords . Keywords are used to unlock or access data , Hash table's “ Next to impossible ” The idea is to map each keyword to a unique index , In this way, you can directly unlock the fire to access every data .

　　 Hash guessing game algorithm is a common mathematical operation method in the field of cryptography , It's bitcoin 、 The etheric fang 、Filecoin And other cryptocurrency projects .

　　 Store in IPFS Documents 、 picture 、 Video and other files will be hashed , Get a unique hash value .

　　 The hash algorithm has 3 Characteristics ：

　　（1） Only identical input values can output the same hash value .

　　（2） Even if the input value changes slightly , The output hash values are also very different .

　　（3） There is no rule between the output value and the input value , Therefore, the input value cannot be deduced from the output value .

　　 There are many kinds of hash algorithms , But they all have the following four properties ：

　　 Hash algorithm property 1 ： Isometric property

　　 Whether the input data is long or short , The hash values obtained by the algorithm all have the same length . Hash values are often very short , Usually only onehundredandtwohundred bytes , It takes up very little storage space .

　　 Hash is translated into English Hash Also commonly known as hashing , It refers to inputting data of any length , Through the hash algorithm into a fixed length of data output , The output is the hash value . Simply speaking , Hash value is to find a mapping relationship between data content and data storage address . The space for hash values is usually much smaller than the space for input , Different input data will be hashed into the same output data .

　　 When the hash value is calculated by the hash algorithm , The whole process is tamper proof 、 Of an irreversible nature , So hash algorithm is also widely used in encryption technology .

　　 Hash is mainly used in

　　1. Hash table --- A data structure that uses hash functions to associate key names with key values ;

　　2. geometric hashing --- Refers to an effective method of finding the same or similar geometric shapes ;

　　3. Encryption hash --- Refers to the use of... In the field of information security ;

　　4. Associative array --- A data structure that is often implemented using hash tables ;

　　 The implementation of hash technology is based on hash function , It can be understood that the sennie function is to realize information compression , Compress the message string into a numeric digest , Decrease according to the quantity , Fixed format .

　　Hash algorithm,also known as hash algorithm and hash algorithm,is a method to create small digital fingerprints from any file.Hash algorithm,like fingerprint,is a sign that uses short information to ensure the uniqueness of the file.This symbol relates to every byte of the file,so it is difficult to find the inverse law.Therefore,when the original file changes,its flag value will also change,so as to tell the file user that the current file is no longer the file you need.

　　Hash algorithm can map binary plaintext of any length to shorter binary string,and different plaintext is difficult to map to the same hash value.

　　It can also be understood as a spatial mapping function,which maps from a large value space to a small value space.Since it is not mapped one by one,the hash function is irreversible after conversion,that is,it is impossible to restore the original value through reverse operation and hash value.