The invention provides an information interaction system. The information interaction system includes electronic cipher key equipment without buttons and a transaction terminal. The electronic cipherkey equipment without the buttons is used for receiving a transaction message sent by the transaction terminal, generating and displaying a first confirmation code, generating a first rolling factor,performing a signature operation on a to-be-signed data packet to obtain signature data, and performing an operation to obtain a first encryption key based on a first cipher key and the first confirmation code, performing an encryption operation on the signature data by using the first encryption key to obtain first encrypted data, and at least transmitting the first encrypted data to the transaction terminal, wherein the to-be-signed data packet at least includes the transaction message and the first rolling factor. The transaction terminal is used for at least receiving the first encrypted data and obtaining a second confirmation code, and at least sending out the second confirmation code, the transaction message, and the first encrypted data.