[判断题] incentive market provides suggestion for customers for making purchases from associated retailers.（ ）

1、[多选题]The essential security requirements for safe electronic payments are（）

• A、authentication
• B、encryption
• C、integrity
• D、nonrepudiation

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2、[多选题]There are two types of encryption:（）

• A、secret key
• B、double keys
• C、missing key
• D、public key

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3、[多选题]The basic categories of business models include（）

• A、brokerage
• B、advertising
• C、community
• D、subscription

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4、[多选题]brokerage models include（）

• A、marketplace exchange
• B、content-targeted advertising
• C、buy/sell fufilment
• D、bounty broker

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5、[判断题]incentive market provides incentives, such as redeemable points or coupons for customers for making purchases from associated retailers.（ ）

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