How do you implement identity verification and access granting processes in systems?

Identity verification and access granting processes are usually implemented through authentication and authorization systems.

1. Authentication — confirming the user's identity, for example, using login and password, biometrics, or tokens.
2. Authorization — determining the user's access rights to resources after successful authentication.

Example in Python using a simple dictionary of users and password verification:

users = {
    'alice': 'password123',
    'bob': 'securepass'
}

def authenticate(username, password):
    if username in users and users[username] == password:
        return True
    return False

# Usage
if authenticate('alice', 'password123'):
    print('Access granted')
else:
    print('Invalid credentials')

More complex methods are used in real systems, including password hashing, two-factor authentication, session management, and roles for access control.