9F77
Unprotected Data Envelope 3Unprotected Data Envelope 3 continues the same numbered family as Envelope 1 (9F75, covered alongside it here) and its other siblings already documented in this dictionary - identical unprotected, free-read design, differentiated from its neighbours mainly by its specific numeric slot and its relatedTags footprint, which here shows only a link back to 9F75 rather than to multiple neighbours, suggesting a less densely cross-referenced position in the sequence than, for instance, Envelope 2's. The operational guidance is the same across every member of this family and worth restating rather than assuming carried over: because unprotected data carries no built-in integrity guarantee, any terminal or host logic consuming 9F77 has made an explicit choice to trust its content at the application layer, appropriate for genuinely low-stakes issuer or scheme data but a real gap if ever mistaken for authenticated content. See EMV Contactless Book C-2.
Interactive decoder
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Binary (3): 0B0B0B
This tag is not a bitmap; the decoder shows a format-based interpretation.
Decoded example
Example value: 0B0B0B
Related tags
Properties
| Tag | 9F77 |
|---|---|
| Name | Unprotected Data Envelope 3 |
| Format | Binary |
| Length | variable |
| Source | Card (ICC) |
| Templates | — |
| Books | EMV Contactless Book C-2 |
Frequently asked questions
- What is EMV tag 9F77?
- Unprotected Data Envelope 3 continues the same numbered family as Envelope 1 (9F75, covered alongside it here) and its other siblings already documented in this dictionary - identical unprotected, free-read design, differentiated from its neighbours mainly by its specific numeric slot and its relatedTags footprint, which here shows only a link back to 9F75 rather than to multiple neighbours, suggesting a less densely cross-referenced position in the sequence than, for instance, Envelope 2's. The operational guidance is the same across every member of this family and worth restating rather than assuming carried over: because unprotected data carries no built-in integrity guarantee, any terminal or host logic consuming 9F77 has made an explicit choice to trust its content at the application layer, appropriate for genuinely low-stakes issuer or scheme data but a real gap if ever mistaken for authenticated content. See EMV Contactless Book C-2.
- What format and length does EMV tag 9F77 use?
- Tag 9F77 uses the Binary format and is normally variable long.
- Is tag 9F77 provided by the card or the terminal?
- Tag 9F77 (Unprotected Data Envelope 3) is provided by the Card (ICC).
Sources
- C-2-Kernel-2-V2.11-Final-June-2023, p. 435
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