Random Number Generation Methods in Python PyCrypto Library)

Python PyCrypto library is a Python library for encryption and decryption, which contains various random number generation methods.The random number plays an important role in cryptography, used to generate plus key keys, initialization vectors, etc.This article will introduce the random number generation method commonly used in the PyCrypto library, and explain the code and related configurations that need to be explained. In the PyCrypto library, the commonly used random number generation method includes the random number provided by the operating system, the use of hardware random number generators, and the use of pseudo -random number generators. 1. Use the random number provided by the operating system: The random number provided by the operating system is a common and reliable generation method.The PyCrypto library provides the `Crypto.random` module to access the random number provided by the operating system. First, you need to import the `Crypto.random` Module: python from Crypto.Random import get_random_bytes Then you can use the `Get_random_bytes (n)` function to generate a random byte string with a specified length n.For example, a random byte string of 32 byte length: python random_bytes = get_random_bytes(32) This will return a byte string of 32, which can be used to generate key or initialization vectors. 2. Use hardware random number generator: Hardware random number generators are usually more difficult to predict than software generators.In the PyCrypto library, the hardware random generator is selected by using the `new` function of the` Crypto.random` module. python from Crypto.Random import new Then you can use the `new` function to specify the required hardware random number generator.For example, use the hardware random number generator provided by the operating system: python rand_gen = new('urandom') This will return a random number generator object `rand_gen`, which can generate a random byte string with a specified length n by calling its` Read (n) `method.For example, generate 16 -byte length random byte string: python random_bytes = rand_gen.read(16) 3. Use pseudo -random number generator (PRNG): The pseudo -random number generator is a random number generator based on the certainty algorithm, and its generating sequence looks random.The PyCrypto library provides a variety of pseudo -random number generator algorithms, such as `random` and` Fortuna` in the `Crypto.random.OSRNG` Module. First, you need to import the required pseudo -random number generator algorithm.For example, use the `random` algorithm: python from Crypto.Random import random Then you can use the `Random` method to generate random numbers.For example, generate a random 16 -byte length integer: python random_int = random.randint(0, 255) This will return an integer between 0 and 255. Before using the random number generation method, some related configurations may be required.For example, you can use the `Crypto.random.AatFORK () method in the pyCrypto library to reset the random number generator after the FORK system is called to improve the safety and unpredictability of the random number. In summary, the Python PyCrypto library provides a variety of random number generation methods, including the random number, hardware random generator and pseudo -random number generator provided by the operating system.Developers can choose a suitable method according to the actual needs, and set the corresponding settings according to the specific configuration requirements.