9F37
Unpredictable NumberUN
Random value generated by the terminal to give the cryptogram freshness (anti-replay). Part of cryptogram input.
Properties
| Tag | 9F37 |
|---|---|
| Name | Unpredictable Number |
| Format | Binary |
| Length | 4 bytes |
| Source | Terminal |
| Templates | — |
| Books | Book 3 |
Decoded example
Example value: 01234567
Interactive decoder
Paste a hex value for this tag to decode it in your browser. Nothing is sent anywhere.
Binary (4): 01234567
This tag is not a bitmap; the decoder shows a format-based interpretation.
Related tags
Frequently asked questions
- What is EMV tag 9F37?
- Random value generated by the terminal to give the cryptogram freshness (anti-replay). Part of cryptogram input.
- What format and length does EMV tag 9F37 use?
- Tag 9F37 uses the Binary format and is normally 4 bytes long.
- Is tag 9F37 provided by the card or the terminal?
- Tag 9F37 (Unpredictable Number) is provided by the Terminal.
Sources
- EMV 4.4 Book 3, Annex A (Data Elements Dictionary) (page pending verification)
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