Systems and methods for maintaining confidentiality, integrity, and authenticity of the last secret

A system for securely sharing and authenticating a secret, the system comprising a dealer computing system comprising:

• a splitting circuit configured to generate a first split independent of a secret, and generate a second split based on the first split and the secret, the secret comprising a cryptographic element and controlling access to a first key, the secret comprising at least one of a password, a second key, and a tokenized value, and the first key controlling access to a secure computing system;
• an encryption circuit configured to encrypt the first split by an encryption key established between the dealer computing system and the combining computing system, and encrypt the second split by the encryption key established between the dealer computing system and the combining computing system;
• and
• a network interface configured to transmit the encrypted first split to a first share-holder, and transmit the encrypted second split to a second share-holder,
• wherein the dealer computing system is operatively coupled with a combining computing system comprising a combining circuit configured to designcrypt the encrypted first split, designcrypt the encrypted second split, compare first information indicative of the identity of the first share-holder and second information indicative of the identity of the first share-holder, combine the designcrypted first split and the designcrypted second split to recover the secret, in response to the comparison indicating that the first information matches the second information, and communicate with the secure computing system using the first key obtained based on the secret.

A system for securely sharing and authenticating a secret, the system comprising a combining computing system comprising:

• a combining circuit configured to:
• designcrypt an encrypted first split,
• designcrypt an encrypted second split,
• compare first information indicative of an identity of a first share-holder and second information indicative of an identity of the first share-holder;
• and
• combine the designcrypted first split and the designcrypted second split to recover a secret, in response to the comparison indicating that the first information matches the second information;
• and
• communicate with the secure computing system using a first key obtained based on the secret,
• wherein the combining computing system is operatively coupled with a dealer computing system comprising:
• a splitting circuit configured to generate a first split independent of the secret, and generate a second split based on the first split and the secret, the secret comprising a cryptographic element and controlling access to the first key, the secret comprising at least one of a password, a second key, and a tokenized value, and the first key controlling access to a secure computing system;
• an encryption circuit configured to encrypt the first split by an encryption key established between the dealer computing system and the combining computing system, and encrypt the second split by the encryption key established between the dealer computing system and the combining computing system;
• and
• a network interface configured to transmit the encrypted first split to the first share-holder, and transmit the encrypted second split to the second share-holder.