Which of the following is an example of a strong password?

A strong password typically includes a combination of uppercase letters, lowercase letters, numbers, and special characters to create a complex string that is difficult to guess or crack. The chosen answer demonstrates this quality effectively.

In this instance, the password “G6*rdYx@9qPz!L$5” contains a variety of character types, making it significantly harder for attackers to use techniques like brute force to gain access. The length of the password also contributes to its strength, as longer passwords generally have a higher complexity and are less susceptible to being cracked quickly.

In contrast, the other examples provided lack the necessary complexity and variety. Simple sequences like “12345678” and common words or phrases such as “password” and “letmein” are easily guessable and represent poor password choices. These types of passwords are frequently targeted and exploited by attackers, making them unsuitable for protecting sensitive information.