US 11,444,776 B2 · Blockchain with daisy chained records, document corral, quarantine, message timestamping, and self-addressing

Abstract

Permissioned blockchains with off-chain storage establish integrity and no-later-than date-of-existence for documents, leveraging records containing hash values of documents. When a document's integrity or date is challenged, a new hash value is compared with a record in the blockchain. Proving date-of-existence (via hash value in a publication and/or SMS) for the block containing the record establishes no-later-than date-of-existence for the document. Permissioning monetizes operations, enforcing rules for submission rights and content, thereby precluding problematic material (privacy, obscenity, malicious logic, copyright violations) that threatens long-term viability. Compact records and off-chain storage in a document corral (with quarantine capability) preserve document confidentiality and ease storage burdens for distributed blockchain copies. Using multiple hash values for each document hardens against preimage attacks with quantum computing. Daisy chaining records establishes that relationships existed among documents at registration. Self-addressed blockchain registration (SABRe) permits documents to self-identify their blockchain record address (block ID, index).

Claims21

Dependent claims

A method of using a blockchain to generate evidence for proving document integrity, the method executable by a processor, the method comprising:

reserving a blockchain address in a first block for a first record for a document;
entering the blockchain address into a copy of the document;
generating, for the document, the first record in a first format, the first format comprising:
an integrity verification code (IVC) field comprising an IVC portion;
and
a linked record locator field;
wherein the first record comprises:
a first IVC value in the IVC portion of the first record, wherein the first IVC value is for the copy of the document having the blockchain address entered therein;
and
a linked record value in the linked record locator field of the first record, wherein the linked record value indicates a blockchain address of a second record, different than the first record, wherein the blockchain address of the second record indicates a location of the second record within the blockchain, wherein the location of the second record is within a second block that is prior to the first block in the blockchain, wherein the linked record value includes a block identifier of the second block, and wherein the linked record locator field does not link blocks of the first blockchain;
and
generating, in the blockchain, a first block comprising the first record, wherein the first block is chained to a prior block in the blockchain using a second IVC value.

9 more elements

A method of using a first blockchain to generate evidence for proving document integrity, the method executable by a processor, the method comprising:

reserving a blockchain address in a first block for a first record for a document;
entering the blockchain address into a copy of the document;
generating, for the document, the first record in a first format, the first format comprising:
an integrity verification code (IVC) field comprising a first IVC portion;
and a linked record locator field;
wherein the first record comprises:
a first IVC value in the first IVC portion of the first record;
and
a first linked record value in the linked record locator field of the first record;
and generating, in the first blockchain, the first block comprising the first record,
wherein the first linked record value indicates a location of a blockchain address of a second record, different than the first record, wherein the blockchain address of the second record indicates a location of the second record within the blockchain, wherein the location of the second record is within a second block that is prior to the first block in the first blockchain, wherein the first linked record value includes a block identifier of the second block, and wherein the linked record locator field does not link blocks of the first blockchain.

8 more elements

One or more computer storage devices having computer-executable instructions stored thereon for using a blockchain to generate evidence for proving document integrity, which, on execution by a computer, cause the computer to perform operations comprising:

reserving a blockchain address for a first record for a document;
entering the blockchain address into a copy of the document;
generating, for the document, the first record in a first format, the first format having a fixed number of bytes and comprising:
an integrity verification code (IVC) field comprising an IVC portion;
an index field;
and
a linked record locator field;
wherein the first record comprises:
a first IVC value in the IVC portion of the first record;
a first index value in the index field of the first record;
a first linked record value in the linked record locator field of the first record;
and
a second linked record value in the linked record locator field of the first record;
and
generating a second record in the first format, wherein the second record comprises:
a second IVC value in the IVC portion of the second record, wherein the first and second IVC values each comprises at least a portion of a Secure Hash Algorithm (SHA) message digest;
and a second index value in the index field of the second record;
a third linked record value in the linked record locator field of the second record;
a fourth linked record value in the linked record locator field of the second record;
generating, in the blockchain, a first block comprising the first record;
generating, in the blockchain, a second block comprising the second record, wherein the first linked record value indicates a blockchain address of the second record in the blockchain, wherein the second block appears prior to the first block in the blockchain;
generating, in the blockchain, a third block comprising a third record, wherein the third block appears prior to the first block in the blockchain, wherein the second linked record value indicates a blockchain address of the third record in the blockchain, wherein the third linked record value indicates a location of a fourth record in the blockchain and the fourth linked record value indicates a location of a fifth record in the blockchain, thereby linking the first record with the second record, the third record, the fourth record, and the fifth record in a daisy chain, and wherein each blockchain address indicates at least a block and an index value of a linked record, and wherein the linked record locator field does not link blocks of the first blockchain.

19 more elements

Dependencies are inferred from the claim text.

Blockchain with daisy chained records, document corral, quarantine, message timestamping, and self-addressing

Life of this patent

Blockchain with daisy chained records, document corral, quarantine, message timestamping, and self-addressing

Life of this patent

Abstract

Claims21