91
Issuer Authentication DataData sent by the issuer for the card to authenticate the issuer (external authenticate / issuer authentication).
Properties
| Tag | 91 |
|---|---|
| Name | Issuer Authentication Data |
| Format | Binary |
| Length | 8–16 bytes |
| Source | Issuer |
| Templates | — |
| Books | Book 3 |
Interactive decoder
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Related tags
Frequently asked questions
- What is EMV tag 91?
- Data sent by the issuer for the card to authenticate the issuer (external authenticate / issuer authentication).
- What format and length does EMV tag 91 use?
- Tag 91 uses the Binary format and is normally 8–16 bytes long.
- Is tag 91 provided by the card or the terminal?
- Tag 91 (Issuer Authentication Data) is provided by the Issuer.
Sources
- EMV 4.4 Book 3, Annex A (Data Elements Dictionary) (page pending verification)
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