1. E-cert (Digital Certificate)
电子证书 (電子證書)

2. On the Internet, nobody knows you’re a dog.
Extracted from

3. What is it? An electronic file Considered as “electronic passport”
Issuing body in Hong Kong
Hong Kong Post (香港邮政)
HK$50/year

4. Functions Authentication Encryption Verify the identity of someone
Convert ordinary data into unreadable code

5. E-banking two-factor authentication
In addition to account name and password

6. Problems of account name and password
Bad passwords
Birthday
Name of wife/husband/pets
Etc.
User wrote it down and stick it on the monitor
User tells others
Re-use passwords