"12345678" is a numerical sequence consisting of eight digits in ascending order. It is often used as a simple example of a password or code due to its straightforward and predictable nature. However, this simplicity makes it highly insecure for protecting sensitive information. In cybersecurity, using sequences like "12345678" as passwords is strongly discouraged. Such passwords are easily guessed by attackers using automated tools. Instead, experts recommend creating complex passwords that include a mix of letters, numbers, and special characters to enhance security and protect personal data from unauthorized access.