A、B2C(business-to-consumer)、B2B(business-to-business) B、B2C(business-to-consumer)、C2C(consumer-to-consumer) C、P2B(person-to-business)、C2C(consumer-to-consumer) D、P2B(person-to-business)、B2B(business-to-business)
A、對稱加密體制 B、公鑰加密體制 C、RSA加密體制 D、數(shù)據(jù)加密標準DES
A、80 B、70 C、100 D、90