Please elaborate on the advantages and disadvantages of this system! Thank you
Advantages: just remember the password, do not need to carry other media. The lowest cost.
Disadvantages: slow, enter the password generally takes several seconds, if too many people out of the need to line up. If you enter the error, you need to re-enter, take longer. Poor security, next to the people easily through the gesture to remember someone else's password, password easy to forget or leaked. Trend: password access to the use of fewer and fewer occasions, only in the low security requirements, low cost, the use of infrequent occasions are still in use. For example: safe.
By entering the password, the system to determine the correct password to drive the electric lock, open the door release.
