A method of establishing a secure channel for communication between a first computing device and a second computing device is described The method uses an elliptic curve Diffie-Hellman protocol, wherein G is an elliptic curve generator point and the first computing device has a unique private key dc with a public key Qc = dc G certified by a party trusted by the second computing device The first computing device generates 520 a blinding factor r and sends 540 a blinded public key R = r Qc to the second computing device The second computing device generates 510 an ephemeral private key dt and a corresponding ephemeral public key Qt = dt G and sends Qt to the first computing device The first computing device generates 530 Kc = KDF (r dc Qt) and the second computing device generates 550 Kt = KDF (dt R), where KDF is a key derivation function used in both generation operations, to establish a secure channel between the first computing device and the second computing device G is a point in the elliptic curve group E, wherein E is a group of prime order but E* is the quadratic twist of E and is a group of order m = z m' where m' is prime and z is an integer, wherein r dc is chosen such that z is a factor of r dc Suitable apparatus for performing the method is also described

Secure channel establishment

The invention belongs to the field of multi-factor authentication protocols and discloses an identity-free three-factor remote user authentication method. Identity-free three-factor authentication is realized through elliptic curve based public key cryptography. The method includes steps: 1, a server generates a public and private key pair and other public parameters; 2, a user submits registration information to the server, and a registration center returns corresponding data or a smart card; 3, the user inputs a password and biological features and inserts the smart card to calculate registration parameters which are sent to the server, and by corresponding data exchange between the user and the server, authentication and key agreement are realized, and a session key is generated. On the basis of a remote user authentication environment, user authentication can be smoothly realized through the server without identity input; on the basis of three-factor authentication with the password, the smart card and the biological features involved, safety of the method is guaranteed, and all referred attacks can be resisted, and the method is applicable to fields of security, finance and the like high in safety requirement.

Identity-free three-factor remote user authentication method

The invention discloses an anonymous entity identification method based on a password. The method comprises the following steps that 1) a server generates a private key of the server and a system parameter according to a given safety parameter; 2) a user emits a login request to the server and the server issues a voucher sigma to the user; and then the user encrypts the voucher sigma and stores; 3) when the user logs in the server, the server generates a message Y for the user and carries out signature so as to acquire sigma S, and then (Y, sigma S) is sent to the user; 4) the user uses a public key in the system parameter to verify the (Y, sigma S), and if verification passes, the user generates a message X; 5) the user uses login request information and the sigma to generate a showing certificate sigma C related to a label (X, Y, sigma S); and then (X, sigma C) is sent to the server; and 6) the server verifies whether the (X, sigma C) is legal, and if the(X, sigma C) is legal, anonymous verification of the user passes. In the invention, privacy protection of the user can be realized.

Anonymous entity identification method based on password

The invention discloses a three-factor authentication method in a multi-server environment, which belongs to the field of multi-factor authentication protocols. Three-factor authentication in a multi-server environment is realized using the public key cryptography based on Chebyshev chaotic mapping. The method includes the following steps: S1, a registration center generates a Chebyshev polynomial parameter; S2, a server or a user submits registration information to the registration center, and the registration center returns corresponding data or a smart card; and S3, the user inputs an account, a password and biometric characteristics, calculates login parameters and sends the login parameters to the server, and the user, the server and the registration center carry out corresponding data exchange to realize authentication and key negotiation and generate a session key. The method is based on a multi-server environment. Users can get service on all servers through one registration. Through authentication based on three factors, namely, password, smart card and biometric characteristic, the method is secure and can resist all attacks mentioned. The three-factor authentication method is applicable to security protection, finance and other occasions requiring high security.

Three-factor authentication method in multi-server environment

The invention relates to a dynamic password authentication method without re-registration and supporting offline authentication, belonging to the field of information security. The invention adds a clock at both ends of a user and a server, and uses a mobile phone as an authentication auxiliary mode to design a dynamic password scheme related to time. The chain length is not limited, and offline authentication technology is supported. At the same time, no matter whether the user logs in or not, the password will be changed every very short time interval. It is almost impossible for the attacker to crack the dynamic password in this very short time, thus protecting the security of the user. This scheme is suitable for users with high password security requirements, especially suitable for users who wish to achieve offline authentication.

A dynamic password authentication method without re-registration and supporting offline authentication

The invention provides a remote authentication protocol method based on password and an intelligent card, and belongs to the field of information safety. The protocol employs an optimized elliptical curve algorithm, a counting set and authentication codes are embedded, password can be modified, and the lost intelligent card can be canceled. The anonymity of a user is ensured, the method is safe and efficient, mutual authentication and negotiation of session key of the user are realized via twice interaction, and the method is suitable for remote authentication systems as e-cash, online education and remote medicine.

Remote authentication protocol method based on password and intelligent card

The invention provides a remote protocol authentication negotiation protocol method based on biological features and belongs to the field of information safety. An efficient elliptic curve coding system is adopted. The method comprises the following steps that (1) system initialization is carried out to generate elliptic curve data; (2) a user submits register information to a server through a safe channel, and the server conducts data processing and then stores the information into an intelligent card and sends the information to the user through the safe channel; (3) a user needs to calculate login information and sends the login information to the server; (4) the purpose of authentication and key negotiation between the user and the server can be achieved through two times of hand shaking, and a session key is generated; (5) the user can achieve the purposes of changing a password and the biological features through the operation of the intelligent card without the assistance of the server. By means of the design, the protocol is high in safety, all mentioned known attacks can be resisted, meanwhile, dynamic identity is adopted, the anonymity of the user is protected, and the calculation performance is also greatly improved. The method is suitable for online education, remote medical and other remote authentication systems.

Remote protocol authentication method based on biological features

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Remote authentication protocol method based on password and intelligent card

Remote protocol authentication method based on biological features