Storage medium, relay device, and communication method

A relay device, comprising:

• a memory;
• and
• a processor coupled to the memory and the processor configured to:
• receive a certification of a first communication device from a second communication device which issues the certification to the first communication device,
• receive, from the second communication device, policy information which indicates whether the certificate is permitted to be sent,
• when the first communication device requests that the certificate be sent to the third communication device, determine whether the certificate is permitted to be sent to the third communication device, the third communication device requesting the first communication device to send the certificate,
• when determining that the certificate is permitted to be sent to the third communication device, send, to the third communication device, the certificate.

A communication method executed by a computer, the method comprising:

• receiving a certification of a first communication device from a second communication device which issues the certification to the first communication device;
• receiving, from the second communication device, policy information which indicates whether the certificate is permitted to be sent;
• when the first communication device requests that the certificate be sent to the third communication device, determining whether the certificate is permitted to be sent to the third communication device, the third communication device requesting the first communication device to send the certificate,
• when determining that the certificate is permitted to be sent to the third communication device, sending, to the third communication device, the certificate.