Chapter 4 assessment 1

1. Which of the following hash functions is not available in the Bitcoin scripting language?

   • SHA1

   • SHA512

   • RIPEMD160

   • SHA256

2. Which elliptic curve is used to create digital signatures used in Bitcoin transactions?

   • Secp256k1

   • FRP256v1

   • NIST P-256

   • E-382

3. Which of the following Pay to Hash Puzzle script templates is no longer usable on the BSV network?

   • OP_HASH256 <hash> OP_EQUAL

   • OP_SHA256 <hash> OP_EQUAL

   • OP_HASH160 <hash> OP_EQUAL

   • OP_RIPEMD160 <hash> OP_EQUAL

4. What piece of information do I need to provide to solve a Pay to Hash Puzzle ?

   • The unhashed digital signature

   • The SHA256 hash of the data

   • The parent TXID

   • The unhashed data used to make the hash