ScriptSig or Signature Script, is the data generated by a spender which is almost always used as variables to satisfy a pubkey script.
secret key (aka private key)::
The secret number that unlocks bitcoin sent to the corresponding address. pass:[<span class="keep-together">A secret</span>] key looks like the following: +5J76sF8L5jTtzE96r66Sf8cka9y44wdpJjMwCxR3tzLh3ibVPxh+.
The secret number that unlocks bitcoin sent to the corresponding address. pass:[<span class="keep-together">A secret</span>] key looks like the following:
Segregated Witness is a proposed upgrade to the Bitcoin protocol which technological innovation separates signature data from bitcoin transactions. Segregated Witness is a proposed soft fork; a change that technically makes Bitcoin’s protocol rules more restrictive.