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@ -73,24 +73,39 @@ Page3 is used as follows by the Proxmark3 RDV4 firmware:
To ensure your Proxmark3 RDV4 is not a counterfeit product, its external flash contains a RSA signature of the flash unique ID.
You can verify it with: `mem info`
Here below is a sample output of a RDV4 device.
```
[usb] pm3 --> mem info
[=] --- Flash memory Information ---------
[=] -------------------------------------------------------------
[=] ID | xx xx xx xx xx xx xx xx
[=] SHA1 | xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx
[=] RSA SIGNATURE |
[00] | xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx
[01] | xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx
[02] | xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx
[03] | xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx
[=] KEY length | 128
[+] RSA key validation ok
[+] RSA Verification ok
[usb] pm3 --> mem info
[=] --- Flash memory Information ---------
[=] ID................... 25AD99A782A867D5
[=] SHA1................. 67C3B9BA2FA90AD4B283926B70017066C082C156
[+] Signature............ ( ok )
[=] --- RDV4 RSA signature ---------------
[=] C7C7DF7FA3A2391A2B36E97D227C746ED8BB475E8766F54A13BAA9AAB29299BE
[=] 37546AACCC29157ABF8AFBF3A1CFB24275442D565F7E996C6B08090528ADE25E
[=] ED1498E3089C72C68348D83CBD13F1247327BDBC9D75B09ECE3E051E19FE19BB
[=] 98CB038757F2EDFD2DC5060D05C3296BC19A6F768290D555DFD50407E0E13A70
[=] --- RDV4 RSA Public key --------------
[=] Len.................. 128
[=] Exponent............. 010001
[=] Public key modulus N
[=] E28D809BF323171D11D1ACA4C32A5B7E0A8974FD171E75AD120D60E9B76968FF
[=] 4B0A6364AE50583F9555B8EE1A725F279E949246DF0EFCE4C02B9F3ACDCC623F
[=] 9337F21C0C066FFB703D8BFCB5067F309E056772096642C2B1A8F50305D5EC33
[=] DB7FB5A3C8AC42EB635AE3C148C910750ABAA280CE82DC2F180F49F30A1393B5
[+] RSA public key validation.... ( ok )
[+] RSA private key validation... ( ok )
[+] RSA verification..... ( ok )
[+] Genuine Proxmark3 RDV4 signature detected
```
# backup first!
To make a backup of the signature to file:
`mem dump p f flash_signature_dump o 262015 l 128`