应用安全新购活动

# 示例代码：简单的身份验证逻辑
def authenticate(username, password):
    if username == "admin" and password == "securepass":
        return True
    return False

# 调用示例
if authenticate(input("Username: "), input("Password: ")):
    print("Authentication successful!")
else:
    print("Authentication failed.")

# 示例代码：使用强加密算法
from cryptography.fernet import Fernet

key = Fernet.generate_key()
cipher_suite = Fernet(key)

def encrypt_data(data):
    return cipher_suite.encrypt(data.encode())

def decrypt_data(encrypted_data):
    return cipher_suite.decrypt(encrypted_data).decode()

# 调用示例
encrypted = encrypt_data("Sensitive information")
print(f"Encrypted: {encrypted}")
decrypted = decrypt_data(encrypted)
print(f"Decrypted: {decrypted}")

# 示例代码：输入验证
import re

def validate_input(input_string):
    if re.match(r"^[a-zA-Z0-9]+$", input_string):
        return True
    return False

# 调用示例
user_input = input("Enter data: ")
if validate_input(user_input):
    print("Input is valid.")
else:
    print("Invalid input.")