A
password sharing method comprises the steps that transmission data to be sent are obtained, wherein the transmission data comprise passwords; transmission data codes generate data packets on coding fields, wherein the coding fields are the fields, with content capable of being directly monitored, on encrypted channels encrypted through the passwords in the data packets; the data packets are sent through the encrypted channels. The invention further provides a
password obtaining method which comprises the steps that the data packets which are generated by encoding the transmission data on the coding fields are received through the encrypted channels, wherein the transmission data comprise the passwords, and the coding fields are the fields, with content capable of being directly monitored, on encrypted channels encrypted through the passwords in the data packets; decoding code fields obtain the passwords in the transmission data. According to the
password sharing and obtaining methods, the passwords of the encrypted channels are shared and obtained by utilizing the coding fields, with content capable of being directly monitored, on encrypted channels in the data packets,
peripheral input equipment is not needed, transmission cost of information is lowered, and operation is simple and convenient. In addition, the invention further provides a password sharing device and a password obtaining device.