Abstract: Disclosed is a mechanism for performing an anonymous transfer using a blockchain. A sender's device generates a commitment based on a serial number of a zero-knowledge token and a value of the zero-knowledge token. Moreover, the sender's device generates a range proof and a balance proof for the commitment. The range proof verifies that the value of the zero-knowledge token is within a preset range. The balance proof verifies that the value of a set of input tokens is greater than or equal to the value of the zero-knowledge token. The sender's device sends a conversion request to the blockchain network. The conversion request consumes the set of input tokens and generates the zero-knowledge token. The conversion request includes the generated commitment, the generated range proof, and the generated balance proof.

Abstract: Disclosed is a mechanism for performing an anonymous transfer using a blockchain. A sender's device generates a commitment based on a serial number of a zero-knowledge token and a value of the zero-knowledge token. Moreover, the sender's device generates a range proof and a balance proof for the commitment. The range proof verifies that the value of the zero-knowledge token is within a preset range. The balance proof verifies that the value of a set of input tokens is greater than or equal to the value of the zero-knowledge token. The sender's device sends a conversion request to the blockchain network. The conversion request consumes the set of input tokens and generates the zero-knowledge token. The conversion request includes the generated commitment, the generated range proof, and the generated balance proof.

Abstract: A system and a method are disclosed for enabling cross-chain transactions between a first blockchain and a second blockchain. A certificate for a cross-chain transaction processed by a sidechain is received. Additionally, a verification key associated with the sidechain is received. Moreover, information related to the cross-chain transaction processed by the sidechain is received. Based on the verification key associated with the sidechain, the validity of the certificate is verified using a zero-knowledge proof. In response to determining the validity of the certificate, the cross-chain transaction is processed based on the received information related to the cross-chain transaction processed by the sidechain.

Abstract: Disclosed is a mechanism for performing an anonymous transfer using a blockchain. A sender's device generates a commitment based on a serial number of a zero-knowledge token and a value of the zero-knowledge token. Moreover, the sender's device generates a range proof and a balance proof for the commitment. The range proof verifies that the value of the zero-knowledge token is within a preset range. The balance proof verifies that the value of a set of input tokens is greater than or equal to the value of the zero-knowledge token. The sender's device sends a conversion request to the blockchain network. The conversion request consumes the set of input tokens and generates the zero-knowledge token. The conversion request includes the generated commitment, the generated range proof, and the generated balance proof.