摘要:
An information transmitting apparatus encrypts and transmits transmit data that includes contents for which transmission instruction has been received, an authentication code, and padding. The information transmitting apparatus includes a padding calculating unit that calculates a size of the padding based on an encrypting algorithm, a size of the authentication code and a size of the contents; a transmit-data size calculating unit that calculates a size of the transmit data from the size of the padding, the size of the authentication code, and the size of the contents; a generating unit that generates, using the size of the transmit data, a header that indicates a type of the transmit data and the size of the transmit data; an encrypting unit that encrypts the transmit data; and a transmitting unit that transmits the header and the encrypted transmit data.
摘要:
An information transmitting apparatus encrypts and transmits transmit data that includes contents for which transmission instruction has been received, an authentication code, and padding. The information transmitting apparatus includes a padding calculating unit that calculates a size of the padding based on an encrypting algorithm, a size of the authentication code and a size of the contents; a transmit-data size calculating unit that calculates a size of the transmit data from the size of the padding, the size of the authentication code, and the size of the contents; a generating unit that generates, using the size of the transmit data, a header that indicates a type of the transmit data and the size of the transmit data; an encrypting unit that encrypts the transmit data; and a transmitting unit that transmits the header and the encrypted transmit data.
摘要:
An encryption communication method for performing communication that includes a data transfer phase for transmission of content data and a handshake phase for user authentication or agreement on the transmission method for content data, the method comprising: storing one set of a plurality of content data for multiple users in a common transmission communication region provided for the multiple users; transferring the stored one set of the plurality of content data during the data transfer phase when transferring content data of the multiple users to a communication target device; and receiving the stored one set of the plurality of content data using a plurality of transmission-reception communication regions provided for each of the multi users is provided.
摘要:
A method, device and computer-readable recording medium that stores therein a computer program for data decryption to execute processing when encrypted communication data including encrypted data obtained by encrypting plain text data and communication attributive data representing information of a data size of communicated data is received, the computer program making a computer execute notifying for receiving only the communication attributive data in the encrypted communication data and notifying the data size represented by the received communication attributive data to a preparing unit which prepares a storage area for storing the encrypted communication data in temporary storage incorporated in the computer. The computer program also enables the computer to execute storing the encrypted communication data in the prepared storage area and decrypting the encrypted data contained in the encrypted communication data, which is stored in the storage area, to obtain the plain text data.
摘要:
When processing a data conversion function of a MISTY structure, such as the FO function of MISTY1, the logical calculation result t3 of the exclusive OR 614 of the process result of the FI function 602 of the MISTY structure in the second stage and a logical calculation result t1 of an exclusive OR 612 of the MISTY structure in the first stage is not stored in a register. The logical calculation result t3 and the logical calculation result of respective exclusive OR 642 and 643 are subject to a direct exclusive OR with the respective exclusive OR 642 and 643.
摘要:
A peak of the radiation directivity of light emitted by each of LEDs is directed to a reflecting surface, and the light emitted by the LEDs is indirectly incident on an outer lens after reflection by the reflecting surface. Thus, problems, such as a local increase in brightness of a light emitting surface over areas corresponding to light emitting portions of the LEDs, are prevented. In addition, most of the light emitted by the LEDs is indirectly incident on the outer lens via the reflecting surface, so that dispersion of blue light and yellow light, which constitute the white light, by the outer lens is prevented. Thus, illumination light highly uniform in amount and color can be provided.
摘要:
A cipher processing apparatus for arithmetic operations of an FO function and an FL function comprising: an FL function operating unit for generating a 2N-bit output based on a first extension key; a partial function operating unit for generating an N-bit output based on second and third extension keys; an N-bit intermediate register for storing an output of the partial operating unit; a 2N-bit first data register for storing data based on the output of the FL function operating unit; and a controller for making the partial function operating unit perform six cycles, inputting an output of the intermediate register to the FL function operating unit, and storing the data based on the output of the FL function operating unit in the first data register, in a first case in which the FL function uses a result of an arithmetic operation of the FO function.
摘要:
This cryptographic apparatus executes calculations according to an FI function including a first non-linear function S9 and a second non-linear function S7, and includes a ROM recording a first table including, for each input X of 9 bits, a value obtained by exclusively ORing a first value and an first output from the function S9 with respect to the input X, wherein the first value is generated by shifting lower 7 bits in the first output to left by 9 bits, and a second table including, for each input Y of 7 bits, a value obtained by exclusively ORing a second value and the input Y, wherein the second value is generated by shifting a result of an exclusive OR of the input Y and a second output from the function S7 with respect to the input Y to left by 9 bits.
摘要:
A cipher processing apparatus for arithmetic operations of an FO function and an FL function comprising: an FL function operating unit for generating a 2N-bit output based on a first extension key; a partial function operating unit for generating an N-bit output based on second and third extension keys; an N-bit intermediate register for storing an output of the partial operating unit; a 2N-bit first data register for storing data based on the output of the FL function operating unit; and a controller for making the partial function operating unit perform six cycles, inputting an output of the intermediate register to the FL function operating unit, and storing the data based on the output of the FL function operating unit in the first data register, in a first case in which the FL function uses a result of an arithmetic operation of the FO function.
摘要:
Ciphertext X and a constant C having relationships C>p and C>q with respect to secret keys p and q are input, and correction values C−dp and C−dq (dp=d mod (p−1), dq=d mod (q−1)) are obtained. Then, the ciphertext X is multiplied by the constant C. A remainder operation using the secret key p or q as a remainder value is conducted with respect to the multiplication result. A modular exponentiation operation based on a Chinese remainder theorem is conducted with respect to the remainder operation result, and a correction operation using a correction value C−dp or C−dq is conducted. Thereafter, plaintext Y before being encrypted is calculated.
摘要翻译:输入密文X和关于秘密密钥p和q具有关系C> p和C> q的常数C,并且校正值C SUP和D D < (dp = d mod(p-1),dq = d mod(q-1))。 然后,将密文X乘以常数C.使用秘密密钥p或q作为余数值的余数运算相对于相乘结果进行。 对余数运算结果进行基于中文余数定理的模幂运算,使用校正值C u> -dp或C-Dq SUP>的修正运算是 进行。 此后,计算加密前的明文Y。