问题描述
如果卡支持SDA + DDA,则在什么情况下POS不会执行SDA/DDA操作? POS执行的ODA是否仅基于标签82决定?或由终端检查其他标签/值来决定-ODA是否需要执行...
If card support SDA + DDA , At what condition POS will not perform SDA/DDA operation?? Is ODA performed by POS decided on basis of tag 82 only? or other tags/values check by the terminal to decide - ODA need to perform or not...
对我来说-DDA支票卡是真品,还是真品,并且内部没有数据更改,因此必须由任何终端执行.
For me - DDA check card is genuine or not and no data altered inside it so it must be performed by any terminal.
我还认为,CA公共密钥需要解密证书,此处使用RID +标记8F从密钥存储库中获取正确的密钥.正确吗?
Also I believe CA pubic key require to decrypt the certificate and here RID + Tag 8F used to get the correct key from key repository. Is it correct?
推荐答案
If card support SDA + DDA , At what condition POS will not perform SDA/DDA operation??
仅当POS 无法执行时,POS才会执行SDA/DDA
POS will not perform SDA/DDA only when POS is not able for perform offline Transaction
Is ODA performed by POS decided on basis of tag 82 only?
是的,标签82告诉您,卡是否支持脱机数据身份验证.执行ODA取决于卡和终端的功能.如果Tag 82的DDA位为1,并且终端支持脱机数据身份验证,则终端必须执行DDA.
Yes, Tag 82 tells, card support offline data authentication or not. Performing ODA is depend on capability of card and terminal. If Tag 82, DDA bit is 1 and terminal support offline data authentication, terminal must perform DDA.
Also I believe CA pubic key require to decrypt the certificate and here RID + Tag 8F used to get the correct key from key repository. Is it correct?
每个终端/POS均具有不同的CA公钥,这些公钥需要对证书进行解密.在交易时,POS从卡中读取RID和标签8F(索引),并从密钥存储库中获取相应的密钥.相同的密钥用于解密证书.
Each terminal/POS have different CA public keys that is require to decrypt the certificate. At the time of transaction , POS read RID and Tag 8F ( index) from the card and fetch the corresponding key from key Repository. same key is used to decrypt the certificate.
可以查看有关ODA的更多信息这里....
Can check more about ODA Here....
希望此信息符合要求,欢迎进行任何更正/更新.
hope this information is up to the mark, Any correction/updation are welcome.
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