Gregory Paul Maxwell

US Patent:

20160358165, Dec 8, 2016

Filed:

Jun 8, 2016

Appl. No.:

15/176833

Inventors:

- Montreal, CA
Gregory MAXWELL - Mountain View CA, US

International Classification:

G06Q 20/38

Abstract:

Systems and methods are described for encrypting an amount transacted on a blockchain ledger, while preserving the transaction's ability to be verified. A blinding amount is added to an input value, and an output value is generated and encrypted. Both the input value and the output value are within a value range, where a sum of any two values within the range does not exceed an overflow threshold. The sum of the encrypted input value and the encrypted output value may equal zero. Rangeproofs associated with each of the input value and the output value are generated. The rangeproofs prove that the input value and the output value fall within the value range, and each rangeproof may be associated with a different public key. Each public key may be signed with a ring signature based on a public key of a recipient in the transaction.

US Patent:

20160330034, Nov 10, 2016

Filed:

May 9, 2016

Appl. No.:

15/150032

Inventors:

- Montreal, CA
Gregory MAXWELL - Mountain View CA, US

International Classification:

H04L 9/32
G06Q 20/06
G06Q 40/00
G06Q 20/40

Abstract:

Systems and methods are described for transferring an asset from a parent chain to a sidechain. A simplified payment verification (SPV) proof associated with the parent chain asset may be generated. The SPV proof may include a threshold level of work. The SPV proof associated with the parent chain asset may be validated, and a sidechain asset corresponding to the parent chain asset may be generated. If no reorganization proof is detected, the sidechain asset is released. To redeem the sidechain asset in the parent chain, a SPV proof associated with the sidechain asset may be generated. The parent chain may validate the SPV proof associated with the sidechain asset. The parent chain asset associated with the sidechain asset may be held for a second predetermined contest period. The parent chain asset may then be released if no reorganization proof associated with the sidechain asset is detected.