Shamir Secret Splitting divides a secret into M pieces requiring N parts to reconstitute. This does not absolutely prevent this attack, but requires collusion b

Shamir Secret Splitting divides a secret into M pieces requiring N parts to reconstitute. This does not absolutely prevent this attack, but requires collusion between attackers who are presumably trusted insiders, but trusted insiders can be compromised by blackmail, coersion, greed, or other angles.