----- PKI Application -----

1. Create User
2. Generate Key Pair
3. Approve Key
4. Sign Message
5. Verify Signature
6. Build Web of Trust
7. Exit

Enter your choice (1-7): _

----- User Operations -----

1. Alice
2. Bob
3. Charlie
4. Back

Enter user choice (1-4): _

----- Key Operations -----

1. Generate Key Pair
2. Approve Key
3. Back

Enter key operation choice (1-3): _

----- Message Operations -----

1. Sign Message
2. Verify Signature
3. Back

Enter message operation choice (1-3): _

----- Web of Trust Operations -----

1. Build Web of Trust
2. Back

Enter web of trust operation choice (1-2): _

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