Ten types of passwords cannot be used

In the era when information technology is widely used, passwords have become the main means of identity authentication, but some passwords cannot be used.

1. The password is the same as the user name. For example, the username and password are both 123456789. Almost everyone who steals a password will use the user name as a breakthrough in cracking the decryption code.

2. The password is a few adjacent numbers or letters in the user name. For example, the user name is test1000001, And the password is test or 000001. If your user name is a combination of letters and numbers, such as test000001, when someone else wants to steal your password, they will certainly try the password with letters or numbers in the user name.

3. The password is a continuous or identical number. Such as 123456789 and 1111111. Almost all hacker software will start to test the password with continuous or identical numbers. For example, first try 111, 111 ...... to 9999999999, And then try 123, 321, 234, 1234 ...... if your password is 111111, 123456, or 654321, you can try it out immediately without hacking software.

4. The password is a continuous or identical number, such as abcdefg and jjjjjj. Although there are more letters than numbers, try the same letters such as aaaaa first, and try again the continuous letters such as abcde. the time used by the hacker software is not too long.

5. Use the user name upside down or the prefix and suffix as the password. For example, the user name is test, the password is test123, aaatest, and tset. Take the user name test as an example. After the hacker software tries to use test as the password, it will also try to use such as test123, test1, tset, and tset123 as the password, as long as it is the transformation method you want, hackers may also want to obtain the password. It almost does not take time to crack the password.

6. use Pinyin as the password. Among many hacker software, hundreds of surnames are often listed one by one and put in the forefront of the dictionary. It takes only a moment to crack your password. There is also a risk of using pinyin as the password with the last name or name: if the person who wants to steal your password finds out your real name, it is very likely that you use the pinyin combination in your name to try the password.

7. use your birthday as the password. Because the month only has 1 ~ 12 can be used, indicating that only 1-31 of the date can be used, indicating that the date must be 19xx or xx, so the expression is only 100 × 12 × 31 × 2 = 74400, even if there are a total of six sorting orders, there are only 74400x6 = 446400. Search by common computer 3 ~ per second ~ 40 thousand-bit rate calculation. It takes up to 10 seconds to crack your password.

8. Use common English words as passwords. Generally, each hacker software contains 0.1 million ~ 0.2 million English words and corresponding dictionary libraries. If your password is in this database, even if the dictionary contains 0.2 million words, consider some DES (Data Encryption Algorithm) encryption operations to search for 1800 words per second, it only takes 110 seconds.

9. Use a password of less than 8 digits. There are only 10 digits, and the 8-digit combination method is only 10 to the power of 8 = 100,000,000, search by common computer 3 ~ per second ~ With 40 thousand computing speeds, it takes less than three hours for hackers to crack your password.

10. use lower-case letters and numbers as the password. There are 36 lowercase letters and numbers in total, and the combination method is only 36 to the power of 5 = 60466176 possibilities, search by ordinary computer 3 ~ per second ~ With 40 thousand computing speeds, it takes only 25 minutes for hacker software to crack the password.