Path review · Beginner
Answer every question. Results describe this exercise only, not professional competence.
0 / 6 answered
What is a blockchain?
They would not establish whether the voucher was still spendable. Add a validity check before acceptance, and a rule for conflicting histories. Your diagram should distinguish receipt from acceptance and show that three copies of a mistake do not make it valid.
Hashes, keys and signatures
No. The recipient was part of the signed message, so changing it changes what is being verified. The original signature does not authorize that new message. This protects the integrity of the request; it does not protect someone who approved the wrong recipient in the first place.
Hot, warm and cold wallets
The first may be recoverable with the correct wallet information. The second requires recognizing that another party may authorize spending. Restoring the same exposed secret does not remove the attacker’s knowledge. Write a fictional incident response that distinguishes lost hardware from exposed keys.
Coin, token, network and address
The platform supports A, not the stated holding on B. Matching symbols or address lengths do not resolve this mismatch. Do not treat a bridge as an automatic or risk-free solution.
Read a transaction explorer
The token event records 25 USDX. Zero native value does not erase that transfer, and the ETH fee is a separate movement. This fictional record does not prove a real-world identity.
Recognise a wallet scam
The recovery-word request and forced urgency are warning signs. Do not interact with that form. Verify the service independently; partial disclosure is not a safe test.