15 characters is long enough for many services. Long and unique passwords are better than short ones because they are more difficult to guess. Some online services allow you to freely set any kind of password you like, but many services impose requirements on password length and the range of characters that you can use so as to increase the security of the service. A good password is a string of characters that other people cannot guess or find out. This is one of the reasons why you should take the time to come up with a good password that only you are aware of.Ī password is simply a string of characters known only to you, the purpose of which is to prevent unauthorised access to your account. Many services use email addresses as usernames, making them easy to guess. The combination of username and password is used for user identification and authentication. The purpose of this login process is to monitor and limit the users of the service. Many online services require you to log in using a username and password.
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