A secret service agent wrote the encryption key for secret m...

A secret service agent wrote the encryption key for secret messages on four pages of their diary, as shown below.

How many different encryption keys did the agent write?

#1 Klhjskfh2969865 #2 Klhjskfh2969865 #3 Klhjskfh2969865 #4 Klhjskfh2969865

Select only one answer:

• There is 1 encryption key.
• There are 2 different encryption keys.
• There are 3 different encryption keys.
• There are 4 different encryption keys.