| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable a human to directly read a public key displayed on a display medium such as a name card or a card.SOLUTION: On the disclosed name card, a public key used for authenticating a public key authentication method is displayed as character information to be visually recognized. Thus, the owner of the name card can notify the visually recognizable public key to a user who has received the name card by distributing name cards. Thus, the user who has received the name card can perform visual comparison with other arbitrarily received public keys based on a public key 102 written in the name card.</p> |
