Unimodal_RS.py 文件源码

def crypt_secure_randint(r):
    '''
        input: 
        r : the range in which we want the random integer [-r,r]
        output:
        a cryptographiically secure random integer in [-r,r] 
    '''
    cryptogen = SystemRandom()  #takes entropy from operating system
    return cryptogen.randrange(-r,r+1)