PocketCrypto
An airgapped encryption/decryption device for off-grid communication.
There's also a Quick Start Guide available.
What is the PocketCrypto?
The PocketCrypto is a transparent Encryption and Decryption Solution for End-to-End - Encrypted Communications.
It also allows various options to output & input encrypted communication packets. including - but not limited to:
- Text [printed or displayed]
- OFC with the option to manually enter said Text.
- Data Files [output directly on a storage media or transmitted elsewhere]
- i.e. Serial or otherwise
- QR-Codes [printed or displayed]
- AFSK-modulated audio
- which can be transmitted with common off-the-shelf radios
- i.e. 27 MHz PTT Radios.
- which can be transmitted with common off-the-shelf radios
What does the PocketCrypto not do?
Unlike the Cryptofon it is focused on asymetric, short-burst-data/text messages and simplex communications.
- recognizing the need for an off-grid communication solution that has the least possible "electromagentic footprint" of it's own.
- making detection and localizing communicating parties difficult and even impossible when it comes to the recieving end.
- Whereas the Cryptofon is a full-duplex, symmetric communiation protocol.
Unlike LambdaCrypt it is optimized on narrowband communication and not global broadcast and/or unicast.
- That being sad support for "Groups" in the sense of Recievers and & Senders being reachable under the same ID and using the same keys is possible.
- And this may be used for notifying a huge number of recievers with just one transmission.
Acknowledgements
Used Software
Software Dependencies
Competing Products & Services
The closest compareable products might be:
- Iridium Messaging tho it's not end-to-end encrypted.
- Iridium SBD as narrowband M2M messaging Service.
- Iridium Burst because it allows for simplex recieve-only operation of devices.
- Textlite PX-1000 pocketable & encrypted TELEX machine.
- Cybiko PDAs (minus the encryption but with a FCC-compliant short-range, two-way radio in the 900MHz band.)
- Armachat Doomstay Communicators (which don't seem to use encryption and use 915 MHz LoRa for chat).
- the Pwnagotchi's "PwnMail" (which uses SSH Keys but relies on an internet connection and centralized servers!)
- Various CryptoPhones (which not only rely on classic GSM infrastructure but also centralized servers making them prone to state-sponsored hacking attacks and are usually unverifyable blackboxes that might just be giant honeypots
- AOL Communicator (which was a Pager that connected to AOL messenger) - but without a single-vendor/single-provider service that has 0 encryption whatsoever)...
- eCityruf and various other Pagers utilizing POCSAG for (unencrypted!) radio transmission.
- Said analog pager systems are being phased out for digital, [weakly] encrypted ones using TETRA as network.
- TRS-80 / Sharp PC-1/PC-3/PC-8 Pocket Computers (sadly they are hopelessly outdated and never were capable to run any good crypto)
- For the form factor and printing & storage capabilitiy.