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README: document client-side secured-packet decryption

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catarrh committed 2026-08-24 21:23:05 +03:00
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README.md
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@@ -24,7 +24,11 @@ that both captures APDU traffic and serves that PWA.
- SMS TPDU — SMS-DELIVER/SUBMIT, SCTS timestamps, UDH information elements - SMS TPDU — SMS-DELIVER/SUBMIT, SCTS timestamps, UDH information elements
- SCP80 OTA secured packets — SPI bits (ciphering, PoR requirement/mode, - SCP80 OTA secured packets — SPI bits (ciphering, PoR requirement/mode,
RC/CC/DS, counter), KIc/KID algorithm + key set, TAR, CNTR/PCNTR; RC/CC/DS, counter), KIc/KID algorithm + key set, TAR, CNTR/PCNTR;
Response Packet (PoR) decode on GET RESPONSE Response Packet (PoR) decode on GET RESPONSE; **optional client-side
decryption** of ciphered packets — paste the card's 3DES/AES key in the
detail view to reveal the real CNTR and secured application data (the
key stays in the browser, in-memory only; ciphered on-wire CNTR/PCNTR/RC
are ciphertext and labeled as such)
- ATR parse (clock-rate conversion, Fi/Di, T-bitmask) and FCP/FCI TLV - ATR parse (clock-rate conversion, Fi/Di, T-bitmask) and FCP/FCI TLV
**simtrace-analyser PWA** ([`frontend/`](frontend/)): **simtrace-analyser PWA** ([`frontend/`](frontend/)):