System and method for information protection

A non-transitory computer-readable storage medium storing instructions to be executed by a processor to cause the processor to perform operations comprising:

• committing a transaction amount t of a transaction with a commitment scheme to obtain a transaction commitment value T, the commitment scheme comprising at least a transaction blinding factor r_t;
• encrypting a combination of the transaction blinding factor r_t and the transaction amount t with a public key PK_B of a recipient of the transaction;
• and
• transmitting the transaction commitment value T and the encrypted combination to a recipient node associated with the recipient for the recipient node to verify the transaction.

A computer-implemented method for information protection, comprising:

• obtaining a combination of a transaction blinding factor r_t and a transaction amount t encrypted with a public key PK_B of a recipient of a transaction, and obtaining a transaction commitment value T, wherein:
• the transaction amount t is committed with a commitment scheme by a sender node associated with a sender of the transaction to obtain the transaction commitment value T, the commitment scheme comprising at least the transaction blinding factor r_t;
• decrypting the obtained combination with a private key SK B of a recipient of the transaction to obtain the transaction blinding factor r_t and the transaction amount t;
• and
• verifying the transaction based at least on the transaction commitment value T, the transaction blinding factor r_t, and the transaction amount t.