Abstract: A method for dynamic encryption and signing includes: obtaining, by a terminal during session connection, a predetermined first key index and a randomly-generated first signature index; signing session request data with a first signature corresponding to the first signature index; encrypting the session request data with a first key corresponding to the first key index; sending the encrypted session request data and the first signature index to the server; and receiving, from the server, session response data signed with a second signature corresponding to a second signature index and encrypted with a second key corresponding to a second key index, after decryption and signature verification by the server over the session request data succeed. The second signature index and the second key index are randomly selected by the server and saved in a login session object accessible by both the server and the terminal.

Abstract: A method for dynamic encryption and signing includes: obtaining, by a terminal during session connection, a predetermined first key index and a randomly-generated first signature index; signing session request data with a first signature corresponding to the first signature index; encrypting the session request data with a first key corresponding to the first key index; sending the encrypted session request data and the first signature index to the server; and receiving, from the server, session response data signed with a second signature corresponding to a second signature index and encrypted with a second key corresponding to a second key index, after decryption and signature verification by the server over the session request data succeed. The second signature index and the second key index are randomly selected by the server and saved in a login session object accessible by both the server and the terminal.

Abstract: A method for dynamic encryption and signing, a terminal and a server are provided. The method includes that: at least one key and at least one signature are generated through native data; a first predetermined key index and a first random signature index are selected during session connection; a first key and a first signature are located from the at least one key and the at least one signature according to the first key index and the first signature index; session request data is signed with the first signature, and the session request data is encrypted with the first key and sent to a server; and session response data signed with a second random signature and encrypted with a second random key is received from the server after decryption and signature verification by the server over the session request data succeed.

Abstract: The present disclosure provides a smart card information querying method, including: sending a terminal configuration request to a server, so that the server determines, according to the terminal configuration request, whether a terminal configuration file cached in a terminal needs to be updated, wherein the terminal configuration file is configured based on a geographical area indicated by a smart card and is used for querying smart card information; receiving an update file delivered by the server, when the server determines that the terminal configuration file cached in the terminal needs to be updated; updating the terminal configuration file cached locally according to the update file delivered by the server; and when a connection is established to the smart card in a short-distance communications mode, querying card information of the smart card according to the updated terminal configuration file.

Abstract: The present disclosure provides a smart card information querying method, including: sending a terminal configuration request to a server, so that the server determines, according to the terminal configuration request, whether a terminal configuration file cached in a terminal needs to be updated, wherein the terminal configuration file is configured based on a geographical area indicated by a smart card and is used for querying smart card information; receiving an update file delivered by the server, when the server determines that the terminal configuration file cached in the terminal needs to be updated; updating the terminal configuration file cached locally according to the update file delivered by the server; and when a connection is established to the smart card in a short-distance communications mode, querying card information of the smart card according to the updated terminal configuration file.

Abstract: A method for dynamic encryption and signing, a terminal and a server are provided. The method includes that: at least one key and at least one signature are generated through native data; a first predetermined key index and a first random signature index are selected during session connection; a first key and a first signature are located from the at least one key and the at least one signature according to the first key index and the first signature index; session request data is signed with the first signature, and the session request data is encrypted with the first key and sent to a server; and session response data signed with a second random signature and encrypted with a second random key is received from the server after decryption and signature verification by the server over the session request data succeed.