Nchain Licensing Ag

Brock Doiron

Craig Steven Wright

Wei Zhang

Jad Wahab

Owen Vaughan

A method comprising: retrieving a header file from a first transaction recorded on a blockchain maintained across a plurality of nodes of a blockchain network. The header file comprises: program header information, and reference information comprising one or more respective transaction IDs of one or more respective second transactions stored on the blockchain. Each second transaction comprises a respective section of a body of the program file, at least one of the sections comprising runnable program code. The method comprises, from the blockchain, retrieving the respective section of the program file from at least one of the second transactions based on the reference information; and running a program comprising the program header information and the at least one retrieved section.

Storing a program on a blockchain

According to a first aspect of the disclosure, there is provided a request-response protocol for requesting access to data from a destination transaction. According to a second aspect of the disclosure, there is provided a method of accessing data from one or more destination transactions stored on a blockchain, wherein the method comprises selecting one or more hyperlinks linking to the destination transaction(s).

Sharing data via transactions of a blockchain

A computer-implemented method of linking a first party and a second party, the method being performed by the first party and comprising: obtaining a first cryptographic public-private key pair comprising a first private key and a corresponding first public key; generating a first shared private key pair known to the first party and the second party; and generating a second cryptographic public-private key pair comprising a second private key and a corresponding second public key, wherein the second private key is generated based on the first private key and the shared private key.

Cryptographically linked identities

A second party receives confirmation that a first party agrees to a statement. The second party receives a piece of information after said confirmation and after a cryptographic signature of the first party. To attest to this, the second party generates their own cryptographic signature by signing a portion of data comprising said piece of information or a transformation thereof. A network of nodes is then sent one or more transactions comprising the first and second signatures. Transactions are propagated across the network to be recorded in a blockchain on condition of meeting a validation condition. The validation condition for one of the one or more transactions is that the first signature is included in one of the one or more transactions, the second signature is included in one of the one or more transactions, and the second signature was generated by signing the particular portion of data.

Method of using a blockchain

A computer-implemented method comprising, at a verifying nodes of a blockchain network: obtaining a first transaction which comprises runnable code; receiving a second transaction which includes information comprising at least a submitted instance of an r-part and an s-part of a first ECDSA signature, and further comprising a nonce; and miming the code from the first transaction. The code is configured to verify that H(ƒ(r, d)) meets a predetermined condition defined in the code, and to return a result of true on condition thereof, where r is the submitted instance of the r-part, d is the nonce, His a hash function, and f is a function combining q and d.

Blockchain transaction comprising runnable code for hash-based verification

A method performed by a node of a blockchain network, comprising: accessing the locking script from a first transaction on the blockchain; receiving a second transaction not yet on-chain, the second transaction comprising an unlocking script; extracting from the first transaction or another transaction on the blockchain, a portion of code formulated in a second language other than a first language used for the locking and unlocking scripts; running the extracted portion of code in the second language, wherein as a result thereof the code generates at least one value; writing this value to a storage location readable by the locking script; and running the locking script together with the unlocking script in order to validate the second transaction, wherein the unlocking script is configured to read the first value from said storage location, and a condition for validation according to the locking script is dependent on the first value.

Blockchain transactions including portions of code in different languages for complex validation

At least one proof transaction is received at a node of a blockchain network and comprises at least one Elliptic Curve Digital Signature Algorithm (ECDSA) signature and at least one zero-knowledge proof (ZKP) component. The node verifies the ECDSA signature of the at least one proof transaction based on a public key associated with the ECDSA signature and a signed part of the at least one proof transaction, and determined whether the ZKP component is correct for the ECDSA signature and a defined hash value and a defined hash function, in that it proves an ephemeral key counterpart to an r-part of the ECDSA signature to be a preimage of the defined hash value with respect to the defined hash function.

Hash function attacks

In one aspect, the present disclosure proposes methods, devices and systems and devices for providing a new structured data pertaining to blockchain transactions to implement a new data structure. This new data structure is provided to implement a distributed database. In another aspect, a new distributed data management system (DBMS) is provided, that can manage data associated with the new data structure. However, unlike a conventional DBMS for traditional databases, the present disclosure provides a blockchain DBMS that is configured to managed data associated with one or more blockchain transactions, said data being stored in the new data structure. In another aspect, the present disclosure provides a method for generating or providing one or more blockchain transactions for implementing one or more standard database commands that are received for accessing or manipulating a database, where the data is stored on the new data structure.

Blockchain database management system

According to a first aspect of the disclosure, there is provided a method of accessing data from one or more destination transactions stored on a blockchain, wherein the method comprises selecting one or more hyperlinks linking to the destination transaction(s). According to a second aspect of the disclosure, there is provided a request-response protocol for requesting access to data from a destination transaction.

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London, United Kingdom

Brock Doiron