Table of Contents

Each shuffle algo and what it can bring you

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This app use AFSK demodulated data as random seeds for each char, use LCG + one more random layer as PRNG algorithms to generate passwords.

In theory if the quality of seeds (which is from mostly radio noise) is good enough, then the password randomization would be good enough. But usually they are not, or we don’t know, or they do but not stable. So even if this is more secure than many other PRNG generators, in the best case it even can be considered as TRNG generators, don’t use this at high security scenes, for example money-related things.

All the “send” button/checkbox in this app means send via serial async messages, check serial page in this wiki for more details.

Flood mode is from streaming generated code, this will always streaming into serial, alternatively you can check the savin checkbox to save generated codes and seeds. Keep in mind that with seeds, you can generated same code with proper PRNG, so they are same level of security, don’t leak them.

Each shuffle algo and what it can bring you

There are two dimensions of password safety:

Entropy: When you generate mass of password, it should split evenly in the possible space, that controls password quality. In this app, the only entropy provider is the demodulated AFSK data. the LCG/ sha-512/ shuffle algo won't bring more entropy.
Randomness: It controls how many total possibilities can be generated. In this app, the only randomness provider is the "each digits using different seed in the buffer" algorithm, which spread the total possible combination into the max value of possibility: (CHARNUMBER)^{DIGITS}.

Algo / Source	Bring Entropy ?	Bring Randomization ?	Bring difficult to reverse calculation ?	Made it harder to Brute-Force ?	Time Complexity and Space Complexity
Use time as seeds to pick a random frequency with LCG to fetch AFSK data	🚫	✅	🚫	🚫	O(1) - O(1)
The original demodulated AFSK data as seeds	✅	🚫	🚫	🚫	O(1) - O(1)
Each digits using different seed in the buffer	✅	🚫	🚫	✅	O(n^DITIGS_NUMBER) - O(n^DITIGS_NUMBER)
The LCG PRNG algo inside of cpp STL	🚫	✅	🚫	🚫	O(n) - O(1)
Shuffle with two groups of seeds	🚫	✅	🚫	✅	O(n) - O(n)
The SHA-512 hash algo	🚫	✅	✅	🚫	O(n) - O(1)
Result	✅ x 2	✅ * 4	✅ * 1	✅ * 2

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Start here

How to collaborate
How to ask questions correctly

User manual

First steps
- About firmwares
- Redirections on this manual/project
Usage cautions
Intended use and Legality
Features
PortaPack Versions (which one to buy)
HackRF Versions
- Original GSG HackRF One
- Clifford's-version
Firmware update procedure
- Updating the Xilinx CPLD on hackrf board
Description of the hardware
- Enclosure/cases
  - 3d printed enclosure
- Internal speaker
- SMD buttons and caps
- Encoder knob
- SMA Connector replacement or removal
User interface
Powering the PortaPack
Troubleshooting
Applications
- Receivers
  - ADS-B
  - AFSK
  - AIS Boats
  - Analog TV
  - APRS
  - Audio
  - BLE RX
  - ERT Meter
  - Level
  - NRF
  - POCSAG
  - Radiosonde
  - Recon
  - Search
  - TPMS Cars
  - Weather/SubGhzD
  - Fox-Hunt
  - ProtoView
- Transmitters
  - ADS-B(S)
  - APRS
  - BHT Xy/EP
  - BLE TX
  - Burger Pager
  - GPS Sim
  - Jammer
  - LGE Tool
  - Morse
  - OOK
  - OOK Editor
  - POCSAG
  - RDS
  - Soundboard
  - Spectrum Painter
  - SSTV
  - TEDI/LCR
  - TouchTunes
  - BLESpam
- Capture
  - C16 Format
- Replay
- Remote
- Scanner
- Microphone Transceiver
- Looking Glass
- Utilities
- Settings
  - App Settings
  - Audio
  - Blacklist
  - Calibration
  - Touchscreen Threshold
  - Config Mode
  - Converter
  - Date/time
  - Encoder Dial
  - Freq. Correct
  - P.Mem Mgmt
  - QR code
  - Radio
  - User Interface
  - Brightness
  - Menu Color
- Debug
- HackRF Mode
- USB Serial Console

Developer Manual

Compilation of the firmware
Create a custom map
Code formatting
PR process
Description of the Structure
Software Dev Guides
- Code contribution rules
- Create a Simple App
- Building External Apps
- Widgets
- SD Card
- Access Radio Hardware
- Interpret Guru meditation crashes
- Create a Complex App
- Theme-system
- Debug via SWD & JTAG
- Debug with serial
- I2C drivers
Tools
Research
- Dissecting the Temperature Logger
- Differences between H1 and H2
UI Screenshots
Maintaining
- Creating a prod/stable release (Maintainers only)
- Maintaining rules
Development States Notes

Hardware Hacks

Repairs
- Replace AMP
Mods
- Add GPIO TO H2
- USB‐C charging modification for older HackRF boards

Note

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