The following are some common phenomena summarized based on some password security research and observations. However, it should be noted that these are only general trends based on statistics and surveys, and do not represent the actual situation of each individual. There are also large differences in countries, regions, cultural backgrounds and education levels: 1. Teenagers (such as small groups aged 10 to 18 or teenagers who are new to the Internet): • Often use simple or obvious numeric sequences (such as "123456", "111111"). • Like to use pop culture, game characters, idol names, Internet buzzwords, etc. as part of the password (such as anime character names, common words in game accounts). • Sometimes choose obvious character arrangements (such as the continuous characters "qwerty" on the keyboard) because they are easy to remember and have a low awareness of security risks. 2. Young adults (18 to 30 years old): • In some cases, try to mix uppercase letters, lowercase letters, numbers and symbols, especially in environments where the platform requires higher complexity. • They often use phrases, birthdays, names, or combinations of special dates related to their lives and interests, such as doing a "Leet conversion" based on a popular anniversary or their birth year (e.g. writing "i" as "1"). • At the same time, due to the popularity of the Internet, they have been exposed to password security warnings from the beginning, so they may use relatively complex combinations for important accounts, but there is also a phenomenon of reusing simple passwords for easy memory. 3. Middle-aged people (30 to 50 years old): • They tend to use information related to themselves or their families, such as their children's birthdays, spouse's names, and the last few digits of their ID numbers. This kind of information is easy for them to remember, but it is often easy for attackers to guess. • Some people begin to pay attention to the complexity of passwords, but they still rely on "familiar and easy to remember" patterns in their habits, and may add fixed digital sequences or simple symbols to their passwords. • Some work and asset management needs drive them to use password management tools, so sometimes they use randomly generated, long passwords that are difficult to guess, but overall, they still rely on simple passwords. 4. Elderly people (50 years and above): • They are more likely to use simple and intuitive digital combinations or passwords that are closely related to personal identity information (such as birth year, phone number, home address number, etc.). Such passwords are easy to remember but less secure. • They may be less receptive to complex symbols and mixed-case passwords and prefer traditional memory methods. • Because the popularization of information technology started late, some elderly people may more frequently use simple passwords set earlier, or repeatedly use the same simple password in multiple services. Overall suggestions: • People of different ages are easily troubled by the "personal information is easy to guess" password mode, so no matter what age group, try to avoid using information that may be associated with the individual as a password. • It is recommended to use password management tools and choose longer, randomly generated passwords to reduce the risk of being cracked by brute force or social engineering attacks. • At the same time, the promotion of multi-factor authentication (MFA) can make up for the security risk of insufficient password complexity to a certain extent. The above summary is for reference only. The actual situation may vary significantly due to different personal habits, cultural backgrounds and levels of cybersecurity awareness.