Coupon Assets (CA) is a platform currency initiated by RADAR LAB (USA) and issued in March 2018. The value of CA token issuance is that it is a highly liquid encrypted digital asset (an equity token) based on the global financial market Assets), acceptance bills with financial attributes, bonds and anti-counterfeiting, etc. Among them, global CA (Certificate Authority) security certification is a security certification and digital signature technology based on public key infrastructure technology, which is used to protect the security of users' communications and business activities on the Internet.