Abstract: Authentication data indicating authenticity of a client is distributed into a plurality of function data as distributed data, the plurality of function data including function data specifying a function and rule data specifying the authentication data from the function. The client and a server shares a portion of the plurality of function data. The client calculates verification data from the function data unshared with the server, by performing a calculation process difficult for a third party to calculate the function data, and transmits the verification data to the server. The server verifies authenticity of the client based on the authentication data and distributed data per client stored therein, and the verification data received from the client.

Abstract: An authenticated apparatus generates scrambled data from key data and authentication data, such that another key data, which configures the product data, or authentication data is obtained through back-calculation of the product data by using the authentication data or key data, the scrambled data including the product data and the like generated by multiplying the authentication data indicative of the authenticated apparatus's or a user's authenticity by the key data. The authenticated apparatus generates verification data through an operation of the authentication data, key data, or scrambled data, and transmits the verification data and scrambled data to an authenticating apparatus. The authenticating apparatus then verifies authenticity of the authenticated apparatus based on the verification data and scrambled data received from the authenticated apparatus and each authenticated apparatus's or each user's authentication data stored in the authenticating apparatus.

Abstract: A decrypting apparatus for decrypting cryptography data included in a packet includes a receiver, a key generator, and a decrypting section. The receiver receives a packet transmitted from an encrypting apparatus that executes an encrypting process. The key generator generates a key used for the encrypting process. The decrypting section decrypts cryptography data included in the packet received by the receiver with using the key generated by the key generator. In the decrypting apparatus, the packet received by the receiver includes packet information used for generating the key. The key generator generates the key with using the packet information.

Abstract: In order to protect SSL encrypted communication from MITM attacks, a server certificate is used in the communication. However, operation of the server certificate is not simple, and the certificate is not sufficient to protect the communication from the MITM attacks. In SSL encrypted communication in which a password is shared between a client and a server, the client encrypts random number data and a password by means of a public key, determines a value by processing encrypted data by means of encrypted password data, and transfers the thus-determined value to the server. The server eliminates the password encrypted data from the value and back calculates the random number data, which are then decrypted, to thus acquire the random number data generated by the client. A hash value of the random number data is submitted to the client.

Abstract: In SSL encryption communication in which a client and a server share a password, the client generates random number data, encrypts the random number data with a public key and a password, and transmits the encrypted random number data to the server, so that the client and the server safely share the random number data having a bit length longer than that of the password. Safe cryptographic communication is performed without intermediaries by using the random number data or by mutually presenting a hash value of the random number data.

Abstract: A first apparatus as a requester is configured to encrypt random number data by using a public key of a second apparatus as a certificate issuer; to perform a calculation that multiples original data by the obtained encrypted random number data; and to deliver the obtained random number scrambled original data to the second apparatus. The second apparatus is configured to perform a calculation that multiples the random number scrambled original data by certified item data; to encrypt the obtained random number scrambled original data having the certified item, using a private key of the second apparatus; and to issue the obtained certificate data to one of the first apparatus and another apparatus that performs verification.

Abstract: Authentication data is distributedly defined by a plurality of distributed data, including function data specifying a function. A portion of the distributed data is shared between an authenticated apparatus and an authenticating apparatus. The authenticated apparatus obtains verification data from the distributed data unshared with the authenticated apparatus, and transmits the verification data. The authenticating apparatus verifies authenticity of the authenticated apparatus, based on the verification data and the like received from the authenticated apparatus. The authenticated apparatus generates the distributed data containing predetermined control data, and transmits the distributed data to the authenticating apparatus. The authenticating apparatus extracts the control data from the distributed data containing the control data, and determines whether or not authentication is granted based on the control data.

Abstract: An authenticated apparatus generates scrambled data from key data and authentication data, such that another key data, which configures the product data, or authentication data is obtained through back-calculation of the product data by using the authentication data or key data, the scrambled data including the product data and the like generated by multiplying the authentication data indicative of the authenticated apparatus's or a user's authenticity by the key data. The authenticated apparatus generates verification data through an operation of the authentication data, key data, or scrambled data, and transmits the verification data and scrambled data to an authenticating apparatus. The authenticating apparatus then verifies authenticity of the authenticated apparatus based on the verification data and scrambled data received from the authenticated apparatus and each authenticated apparatus's or each user's authentication data stored in the authenticating apparatus.

Abstract: Authentication data indicating authenticity of a client is distributed into a plurality of function data as distributed data, the plurality of function data including function data specifying a function and rule data specifying the authentication data from the function. The client and a server shares a portion of the plurality of function data. The client calculates verification data from the function data unshared with the server, by performing a calculation process difficult for a third party to calculate the function data, and transmits the verification data to the server. The server verifies authenticity of the client based on the authentication data and distributed data per client stored therein, and the verification data received from the client.

Abstract: An information processing apparatus comprises: a protocol pass-preventing device provided between a data transmission side and a data reception side, for causing only a predetermined protocol to pass through the protocol pass-preventing device; description means provided on the data transmission side, for describing a protocol which cannot pass through the protocol pass-preventing device in a data area of a protocol which can pass through the protocol pass-preventing device; and extraction means provided on the data reception side, for extracting the protocol which cannot pass through the protocol pass-preventing device from the data area of the protocol data which can pass through the protocol pass-preventing device.

Abstract: An information equipment management system has information equipment 100 and a management computer 200 for managing the information equipment by collecting equipment information about the information equipment 100. The information equipment 100 has an equipment information storage section 101 for retaining equipment information; an equipment information transmission section 102 for establishing communication with the management computer 200; and an equipment information transmission control section 103 for periodically transmitting the equipment information to the management computer 200.

Abstract: An information processing apparatus comprises: a protocol pass-preventing device provided between a data transmission side and a data reception side, for causing only a predetermined protocol to pass through the protocol pass-preventing device; description means provided on the data transmission side, for describing a protocol which cannot pass through the protocol pass-preventing device in a data area of a protocol which can pass through the protocol pass-preventing device; and extraction means provided on the data reception side, for extracting the protocol which cannot pass through the protocol pass-preventing device from the data area of the protocol data which can pass through the protocol pass-preventing device.