Abstract: A gas chromatograph includes a sample gas generator, a separation column configured to separate components of an introduced sample gas, a gas supply source configured to supply a carrier gas to the sample gas generator to carry the sample gas from the sample gas generator to the separation column when the components of the sample gas are analyzed, a controller configured or programmed to acquire an in-analysis usage amount of the carrier gas based on an analysis time for analyzing the components of the sample gas, and a flow rate of the carrier gas supplied from the gas supply source to the sample gas generator, and a display configured to display the in-analysis usage amount acquired by the controller.

Abstract: An authenticating system is provided including a client and a receiver. The client creates a first hash value using a first hash algorithm, and creates a second hash value from the first hash value. The receiver receives a first hash algorithm identifier from a server, transmits the second hash value, and receives an authentication result. The server stores a third hash value created using a second hash algorithm identifier, transmits the first hash algorithm identifier to a PC, receives the second hash value, determines if the second hash algorithm identifier coincides with the first hash algorithm identifier, creates a fourth hash value from the third hash value using the first hash algorithm where it coincides, determines whether the second hash value coincides with the fourth hash value, transmits that the authentication is successful where it coincides, and transmits that the authentication is unsuccessful where it does not coincide.

Abstract: The present invention is an authenticating system including: a client (hereinafter, referred to as C) including a creator for, by employing a first hash algorithm (hereinafter, referred to as 1A), creating a first hash value (hereinafter, referred to as 1V) from authentication information including an ID and a password, and creating 2V from the 1V and a random number, and a receiver for receiving the random number and an 1A identifier from a server (hereinafter, referred to as S), transmitting the ID and the 2V to the S, and receiving an authentication result from the S; and the S including a storage for storing 3V created from the authentication information by employing an 2A identifier and the 2A ID by ID, and a device for transmitting the random number and the 1A identifier to a PC, receiving the ID and the 2V from the PC, determining whether the 2A identifier, which corresponds to the ID, coincides with the 1A identifier, creating 4V from the 3V and the random number by employing the 1A in a case where it