Question: What is the purpose of maintaining a counter for each user in the HE/AuC?
Option 1: To store the user's authentication history
Option 2: To generate a random number for encryption
Option 3: To increment and generate a fresh sequence number for authentication vectors
Option 4: To track the user's location
Explanation: The HE/AuC maintains a counter to generate a fresh sequence number by incrementing SEQHE, which is used to create the next authentication vector. This ensures that each authentication vector is unique and cannot be reused.