摘要:
The invention concerns a device (10) featuring an optical reader (12) for printed codes capable of transforming the information of a code printed on an object such as a label into digital data, the object being equipped with a radiofrequency system featuring an antenna (27) and a chip (28) connected together. According to a main characteristic of the invention, the device features a radiofrequency dialog unit (15) designed to encode the chip (28) with digital data read from the printed code and to compare the digital data encoded in the chip with information from the printed code.
摘要:
The invention relates to chip cards. There is disclosed a chip card (12) with only two contacts intented both to information exchanges (instructions and data) between the card (12) and a card reader and to the power supply of the card (12). According to the invention, the contacts are preferably a clock contact (CLK) used to the synchronization of data and instructions, and a data input/output contact (I/O) used to the transmission of data and instructions from the reader to the card (12) and to the transmission of data from the card (12) to the reader. For the power supply, a full-wave rectifier (bridge of diodes) may be arranged between the two contacts (CLK;I/O). The invention also relates to the communication protocole which allows to use only two contacts (CLK;I/O) while having instructions similar to those of conventional chip cards (initialization of the card, address incrementation of memory cell, reading of the cell, writing, comparison of a confidential code).
摘要:
An electronic entity such as a chip card containing time measurement elements includes a capacitative component (20) having a leak through the dielectric area thereof and being able to be charged when the entity is coupled to an electric power source and a member (22) for measuring the residual charge of the capacitative component which is implemented in a subsequent measure.
摘要:
The invention concerns a device (10) featuring an optical reader (12) for printed codes capable of transforming the information of a code printed on an object such as a label into digital data, the object being equipped with a radiofrequency system featuring an antenna (27) and a chip (28) connected together. According to a main characteristic of the invention, the device features a radiofrequency dialog unit (15) designed to encode the chip (28) with digital data read from the printed code and to compare the digital data encoded in the chip with information from the printed code.
摘要:
An electronic entity such as a chip card containing time measurement elements includes a capacitative component (20) having a leak through the dielectric area thereof and being able to be charged when the entity is coupled to an electric power source and a member (22) for measuring the residual charge of the capacitative component which is implemented in a subsequent measure.
摘要:
A method that enables the certification, at reception as well as at transmission, of messages sent by facsimile includes writing characteristic elements of a message in a rectangular box at the head of this message. A certifier device is used to decode alphanumerical characters of this box, encrypt them, and fashion an alphanumerical seal which is transmitted on the line of the facsimile machine with the standard code of facsimile transmission signals. At reception, the seal appears at the bottom of the message while the box appears always at the top of the message. To authenticate this seal, the receiver may approach an information retrieval center which will carry out the encoding operation on the contents of the box and compare the result with the seal to authenticate the message. When both ends are equipped, the receiver facsimile machine sends the sender facsimile machine an acknowledgment of receipt including the contents of the seal which is itself encoded, thus enabling the sender to authenticate the reception in the same way as the receiver has authenticated the received message. It enables a message transmitted by fax to be given the same legal quality as a message transmitted by telex.