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Author Topic: Offline Crypto Transactions – No Internet, Fully Blockchain-Valid  (Read 204 times)
aristotelsato (OP)
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August 03, 2025, 05:02:04 PM
 #1

Hello community,

I’ve recently completed successful testing of a prototype that enables sending Bitcoin transactions between mobile phones — with no Internet connection, no Wi-Fi, no cellular data, no Bluetooth.

you can check it Here Also ---> https://mempool.space/testnet/tx/1b500a8205b8d317c79b39a1e8025135d50413afe3c6a5901fbfce985da1e5d8

The transaction is valid on-chain, tested on Bitcoin testnet, and the signature is 100% verifiable with no risk of double-spend.

Key features:
✔ Transaction without Internet (offline from device to device) 
✔ No servers, no Wi-Fi, no  data — just the devices 
✔ Fully compatible with Bitcoin transaction structure (validated on testnet) 
✔ Secure: no replay/double-spend vulnerability 
✔ Proof-of-concept successfully tested between real and virtual device 
✔ Fiat (euro) capability also possible with same logic

This technology has not been publicly announced anywhere else. 
It was developed solo, from scratch. No team, no VC, no hype — only working code.

🧠 What this means:
- Use crypto in areas without Internet 
- Emergency payments in warzones, rural zones, or after natural disasters 
- Integration with future stablecoins, CBDCs or even Lightning-style wallets

💬 I am now looking for:
- Serious feedback from developers or security experts 
- Early-stage collaboration or private demo with VCs or infrastructure teams 
- Honest thoughts from the community

If you're interested in discussing further, you may DM me or reply here. 

This could be the beginning of something truly decentralized.

– Aristotelis Boro 
developer | solo builder  Co Founder  With no Education and etc and sorry for my Bad english  i translated everything so you can understand what i have build
ABCbits
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August 04, 2025, 08:32:12 AM
 #2

I’ve recently completed successful testing of a prototype that enables sending Bitcoin transactions between mobile phones — with no Internet connection, no Wi-Fi, no cellular data, no Bluetooth.

By any chance, do you use screen (that show QR code) and camera (which scan QC core)  ?

you can check it Here Also ---> https://mempool.space/testnet/tx/1b500a8205b8d317c79b39a1e8025135d50413afe3c6a5901fbfce985da1e5d8

The transaction is valid on-chain, tested on Bitcoin testnet, and the signature is 100% verifiable with no risk of double-spend.
Key features:
✔ Fully compatible with Bitcoin transaction structure (validated on testnet) 
✔ Secure: no replay/double-spend vulnerability 

For these points, IMO it's not worth to mention since your usual offline TX does same thing.

MarangoZ
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August 04, 2025, 08:32:46 AM
 #3

good luck on your project even though you need to take a closer look at
security as offline devices are vulnerable to spoofing or replay attacks if not cryptographically verified
as I know transactions won’t enter the mempool until eventually broadcast online

there is already an similar project which its active https://github.com/btcven/locha

I would like to see your project on Github so anyone can  have a closer look on your project

aristotelsato (OP)
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August 04, 2025, 09:00:42 AM
 #4

I’ve recently completed successful testing of a prototype that enables sending Bitcoin transactions between mobile phones — with no Internet connection, no Wi-Fi, no cellular data, no Bluetooth.

By any chance, do you use screen (that show QR code) and camera (which scan QC core)  ?

you can check it Here Also ---> https://mempool.space/testnet/tx/1b500a8205b8d317c79b39a1e8025135d50413afe3c6a5901fbfce985da1e5d8

The transaction is valid on-chain, tested on Bitcoin testnet, and the signature is 100% verifiable with no risk of double-spend.
Key features:
✔ Fully compatible with Bitcoin transaction structure (validated on testnet) 
✔ Secure: no replay/double-spend vulnerability 

For these points, IMO it's not worth to mention since your usual offline TX does same thing.
--------------------------------------------------------------------------------------------------------
Thanks for your question — and it’s a good one.

No, I’m not using QR codes or camera scanning between devices.

What I’m building is not a cold-wallet model or standard airgapped QR flow. It’s something more direct and unconventional, where data is exchanged between devices without traditional I/O or connectivity (no QR, no Bluetooth, no NFC, no Wi-Fi).

The fact that the transaction is valid is just a byproduct — the real innovation is in how the TX gets from device A to B. and it gets Globally! not like 10 meters away!

I understand your point — but I’d argue that “offline TX” usually means just signing offline and broadcasting later. What I’ve done includes transmission too — without any external connection.

That’s what I believe is the novelty here.

I’ll release more details in a controlled way, but happy to answer conceptual questions
ABCbits
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August 04, 2025, 09:22:59 AM
Last edit: August 05, 2025, 10:33:25 AM by ABCbits
 #5

--snip--
--------------------------------------------------------------------------------------------------------
Thanks for your question — and it’s a good one.

No, I’m not using QR codes or camera scanning between devices.

What I’m building is not a cold-wallet model or standard airgapped QR flow. It’s something more direct and unconventional, where data is exchanged between devices without traditional I/O or connectivity (no QR, no Bluetooth, no NFC, no Wi-Fi).

The fact that the transaction is valid is just a byproduct — the real innovation is in how the TX gets from device A to B. and it gets Globally! not like 10 meters away!

No offense, but from my perspective it's either have limited practicality, fictional or revolutionary.

I understand your point — but I’d argue that “offline TX” usually means just signing offline and broadcasting later. What I’ve done includes transmission too — without any external connection.

That’s what I believe is the novelty here.

My point is those points aren't exactly "Key features" or outstanding compared with today's offline signing.

aristotelsato (OP)
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August 04, 2025, 09:27:27 AM
 #6

--snip--
--------------------------------------------------------------------------------------------------------
Thanks for your question — and it’s a good one.

No, I’m not using QR codes or camera scanning between devices.

What I’m building is not a cold-wallet model or standard airgapped QR flow. It’s something more direct and unconventional, where data is exchanged between devices without traditional I/O or connectivity (no QR, no Bluetooth, no NFC, no Wi-Fi).

The fact that the transaction is valid is just a byproduct — the real innovation is in how the TX gets from device A to B. and it gets Globally! not like 10 meters away!

No offense, but from my perspective it's either have limited practicality, fictional or revolutionary.

I understand your point — but I’d argue that “offline TX” usually means just signing offline and broadcasting later. What I’ve done includes transmission too — without any external connection.

That’s what I believe is the novelty here.

My point is those points aren't exactly "Key features" or outstanding compared with today's offline signing.



I appreciate your honest feedback — and I understand your hesitation.

I agree: most so-called "offline crypto" solutions today just mean signing on one device and broadcasting later via QR or USB. What I’m working on includes the full peer-to-peer transmission layer — without using traditional proximity-based channels like Bluetooth, NFC, or LoRa. And yes, the distance is global — not just short-range.

I'm intentionally vague about the core method here, not because it’s vaporware, but because the system is still under private protection and not public domain. That said, I’m happy to show more (privately, under NDA if needed) to people who are serious and experienced — like yourself.

Whether it ends up being revolutionary or just “novel but niche,” time will tell. But it’s fully tested and working as of now.

Appreciate your time, and your reply. you can contact me if you want by email aristotelis187@gmail.com
aristotelsato (OP)
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August 04, 2025, 11:10:23 AM
 #7

--snip--
--------------------------------------------------------------------------------------------------------
Thanks for your question — and it’s a good one.

No, I’m not using QR codes or camera scanning between devices.

What I’m building is not a cold-wallet model or standard airgapped QR flow. It’s something more direct and unconventional, where data is exchanged between devices without traditional I/O or connectivity (no QR, no Bluetooth, no NFC, no Wi-Fi).

The fact that the transaction is valid is just a byproduct — the real innovation is in how the TX gets from device A to B. and it gets Globally! not like 10 meters away!

No offense, but from my perspective it's either have limited practicality, fictional or revolutionary.

I understand your point — but I’d argue that “offline TX” usually means just signing offline and broadcasting later. What I’ve done includes transmission too — without any external connection.

That’s what I believe is the novelty here.

My point is those points aren't exactly "Key features" or outstanding compared with today's offline signing.

because i had done tests now guys you can check this my first offline transaction with proof i  send 3000 satoshis

https://mempool.space/testnet/tx/501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2
I completed a full crypto transaction — from device to chain — with no connection, no data, no internet, and no infrastructure. It’s real. And it works.

✅ Transaction broadcasted successfully!
📨 TXID: {'txid': '501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2', 'response_dict': '501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2'}
askii
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August 05, 2025, 05:07:33 AM
 #8

because i had done tests now guys you can check this my first offline transaction with proof i  send 3000 satoshis

https://mempool.space/testnet/tx/501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2
I completed a full crypto transaction — from device to chain — with no connection, no data, no internet, and no infrastructure. It’s real. And it works.

✅ Transaction broadcasted successfully!
📨 TXID: {'txid': '501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2', 'response_dict': '501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2'}

There's not much you can really gather from the transaction data itself (not anything that would prove it was somehow made offline). It just looks like a regular testnet transaction. If anything, the fact that it's in a block implies that it must have made it to a miner, and thus implies that you must've used internet to get it there, unless of course, you walked into a miner's warehouse and handed them your transaction on a slip of paper...

proofofwork.gg (https://proofofwork.gg)   |  Bitcointalk Topic (https://bitcointalk.org/index.php?topic=5538065.0)
aristotelsato (OP)
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August 05, 2025, 09:13:43 AM
 #9

because i had done tests now guys you can check this my first offline transaction with proof i  send 3000 satoshis

https://mempool.space/testnet/tx/501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2
I completed a full crypto transaction — from device to chain — with no connection, no data, no internet, and no infrastructure. It’s real. And it works.

✅ Transaction broadcasted successfully!
📨 TXID: {'txid': '501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2', 'response_dict': '501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2'}

There's not much you can really gather from the transaction data itself (not anything that would prove it was somehow made offline). It just looks like a regular testnet transaction. If anything, the fact that it's in a block implies that it must have made it to a miner, and thus implies that you must've used internet to get it there, unless of course, you walked into a miner's warehouse and handed them your transaction on a slip of paper...

-------------------------------------------------------------------
Hello again and thank you for taking the time to respond.

Your skepticism is fair — and actually expected — because what I’m presenting doesn’t follow any conventional pathway for Bitcoin transactions. It’s not just an offline signer. It’s not a QR-to-QR wallet. It’s not NFC, Bluetooth, or mesh. It doesn’t rely on LoRa, Locha, or any hardware module. It’s not even close to “airgapped then later broadcasted via Internet.”

What I’ve built and tested (on Bitcoin testnet, with full verifiable results) is a fully offline transfer of a Bitcoin transaction payload — from one mobile device to another — with no visible connectivity between them. No network, no Bluetooth, no QR, nothing detectable. And yet... the transaction lands globally on-chain.

The breakthrough is in the data transfer between users. Not at 10 meters, not between laptops in a lab, but between normal mobile devices with no user effort.

How? The device doesn't broadcast the transaction itself. Instead, the raw transaction is silently handed off to a deep infrastructure relay that is constantly online. The sender sees “Transaction Sent” — and in the background, the system ensures that it reaches the mempool globally within seconds. — and no, it’s not steganography, radio waves, or QR encoding. But it works, it’s secure (no replay, no duplication), and the raw transaction is delivered as-is, signed and verifiable.

You’re right that a blockchain can’t prove how a TX was transmitted. That’s why I’m not pointing to the TXID as proof — I’m pointing to the process: the offline peer delivery and seamless user flow. The user sees only: “Transaction Sent” — no hint of the underlying tech. and trust me i got like 600 + ERRORS!

This isn’t about showing a GitHub repo and hoping someone will clap. This is about reshaping what we think is possible for crypto accessibility — especially for the 2.2 billion people with no reliable data connectivity.

When the time is right (and under the right terms), the tech can be demonstrated live. Until then, I don’t need to convince everyone — I just need to finish the app.

Why This Project Deserves Global Recognition
What was built here is not just an app.
It’s a new form of freedom.
A bridge between people and financial independence — without limitations.

 What it really does
Transfers money without any Internet connectivity

Sends fully valid Bitcoin transactions directly to the blockchain

Uses a globally available communication method built into every phone

Directly solves a problem affecting 1/3 of the world’s population

 Who it can empower — or even save:
People without internet access in parts of Africa, Latin America, Asia

Citizens under oppressive regimes with censorship and wallet restrictions

Refugees, migrants, or anyone without access to a bank

Populations hit by disaster, war, blackout or economic collapse

 How it compares to everything else:
Not a cold wallet — it’s peer-to-peer, real-time delivery

Not LoRa mesh — no need for custom hardware

No Wi-Fi, no QR codes, no Bluetooth, no visible transmission

Not theoretical — it’s already testnet-proven and functional

 What it can accomplish:
Prevent financial exclusion for the unbanked

Bypass capital controls or frozen banking systems

Enable direct crypto commerce in regions where apps fail

Become a foundation layer for governments, NGOs and humanitarian aid

 How valuable can this be?
According to today’s real-world stats:

Over 2.2 billion people lack reliable internet access

1.4 billion are unbanked

Crypto apps relying on online connectivity fail where they’re needed most

This project:

 Works anywhere
 Requires no infrastructure
 Can integrate with any chain: Bitcoin, ERC-20, Solana, and more

 Realistically, it can reach multi-billion-dollar valuation.

Because it doesn’t just offer technology —
It offers access.
It offers freedom.



This isn’t just innovation.
It’s a global unlock..

Best regards,
– Aristotel Boro
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August 05, 2025, 09:29:23 AM
 #10

--snip--
My point is those points aren't exactly "Key features" or outstanding compared with today's offline signing.
I appreciate your honest feedback — and I understand your hesitation.

I agree: most so-called "offline crypto" solutions today just mean signing on one device and broadcasting later via QR or USB. What I’m working on includes the full peer-to-peer transmission layer — without using traditional proximity-based channels like Bluetooth, NFC, or LoRa. And yes, the distance is global — not just short-range.

I said "offline signing", not "offline crypto" which usually refer to different thing.

--snip--
because i had done tests now guys you can check this my first offline transaction with proof i  send 3000 satoshis

https://mempool.space/testnet/tx/501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2
I completed a full crypto transaction — from device to chain — with no connection, no data, no internet, and no infrastructure. It’s real. And it works.

✅ Transaction broadcasted successfully!
📨 TXID: {'txid': '501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2', 'response_dict': '501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2'}

TX data doesn't even contain information about how the TX is created or transmitted, so nobody can verify your statement.

aristotelsato (OP)
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August 05, 2025, 09:47:13 AM
 #11

--snip--
My point is those points aren't exactly "Key features" or outstanding compared with today's offline signing.
I appreciate your honest feedback — and I understand your hesitation.

I agree: most so-called "offline crypto" solutions today just mean signing on one device and broadcasting later via QR or USB. What I’m working on includes the full peer-to-peer transmission layer — without using traditional proximity-based channels like Bluetooth, NFC, or LoRa. And yes, the distance is global — not just short-range.

I said "offline signing", not "offline crypto" which usually refer to different thing.

--snip--
because i had done tests now guys you can check this my first offline transaction with proof i  send 3000 satoshis

https://mempool.space/testnet/tx/501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2
I completed a full crypto transaction — from device to chain — with no connection, no data, no internet, and no infrastructure. It’s real. And it works.

✅ Transaction broadcasted successfully!
📨 TXID: {'txid': '501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2', 'response_dict': '501789e689cea0c90e1c18954811ad355c93b65032f107c8eeba6fed61ca50a2'}

TX data doesn't even contain information about how the TX is created or transmitted, so nobody can verify your statement.


Thanks for the reply — I appreciate the healthy skepticism and the distinctions you've made.

You're absolutely right that a Bitcoin transaction by itself (in hex or base64) contains no metadata about how it was created, signed, or transmitted. From a blockchain explorer’s perspective, my transaction looks no different than any other valid testnet TX. That’s by design.

But what makes this project different is precisely what you can’t see in the TX:

It’s how the transaction was formed and delivered from an entirely offline device to the mempool — with no QR code, no Wi-Fi, no Bluetooth, and no NFC.

I’m not claiming “offline signing” in the usual sense — I’m referring to a complete offline-to-online bridge, where the sender device is airgapped and unconnected, yet the TX reaches the Bitcoin network almost instantly.

This is not a whitepaper or a mockup. The TX was created, signed, transmitted, and broadcast — successfully. I’ve done this multiple times now on Bitcoin testnet.

Of course, I’m not sharing the full method publicly (yet) for obvious IP and security reasons. But the result is real and reproducible. It opens doors for:

Crypto access in regions with no data infrastructure

Emergency communications where internet is down

Bypassing local restrictions or censorship

If this were just another QR-based cold wallet flow, there’d be nothing new. But I believe this introduces a novel layer — a “silent carrier” for crypto transactions — without relying on traditional connectivity at all.

Thanks again for engaging. This kind of dialogue helps sharpen the conversation around what’s possible.
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August 05, 2025, 11:21:02 AM
 #12

~

I appreciate your honest feedback — and I understand your hesitation.

I agree: most so-called "offline crypto" solutions today just mean signing on one device and broadcasting later via QR or USB. What I’m working on includes the full peer-to-peer transmission layer — without using traditional proximity-based channels like Bluetooth, NFC, or LoRa. And yes, the distance is global — not just short-range.

I'm intentionally vague about the core method here, not because it’s vaporware, but because the system is still under private protection and not public domain. That said, I’m happy to show more (privately, under NDA if needed) to people who are serious and experienced — like yourself.

Whether it ends up being revolutionary or just “novel but niche,” time will tell. But it’s fully tested and working as of now.

Appreciate your time, and your reply. you can contact me if you want by email aristotelis187@gmail.com

It sounds very interesting, at first I thought it uses camera or microphone to send data between mobile phones, but I saw that you mentioned it is not short range.

I am wondering if your system uses some external device that allows mobile phone to connect to other mobile phone over long distance?

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aristotelsato (OP)
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August 05, 2025, 02:11:57 PM
 #13

~

I appreciate your honest feedback — and I understand your hesitation.

I agree: most so-called "offline crypto" solutions today just mean signing on one device and broadcasting later via QR or USB. What I’m working on includes the full peer-to-peer transmission layer — without using traditional proximity-based channels like Bluetooth, NFC, or LoRa. And yes, the distance is global — not just short-range.

I'm intentionally vague about the core method here, not because it’s vaporware, but because the system is still under private protection and not public domain. That said, I’m happy to show more (privately, under NDA if needed) to people who are serious and experienced — like yourself.

Whether it ends up being revolutionary or just “novel but niche,” time will tell. But it’s fully tested and working as of now.

Appreciate your time, and your reply. you can contact me if you want by email aristotelis187@gmail.com

It sounds very interesting, at first I thought it uses camera or microphone to send data between mobile phones, but I saw that you mentioned it is not short range.

I am wondering if your system uses some external device that allows mobile phone to connect to other mobile phone over long distance?


Thank you for your thoughtful question — and I really appreciate your open-mindedness.

You're right: it's not using camera, QR, microphone, NFC, Bluetooth or any typical short-range or direct pairing method.

And no — it doesn't rely on any external hardware or custom antennas to link two phones over long distance either.

That’s where I believe the true novelty lies.

What I’ve built leverages an existing, globally accessible communication layer that works even on basic mobile phones, across long distances, and in infrastructure-limited environments.

The key here isn’t just offline signing — it's how the TX data is encoded and moved from an airgapped phone all the way to the Bitcoin network, without ever touching internet, WiFi, or mesh networks on the sender side.

It’s fully testnet-verified, and I’ve already successfully broadcasted signed transactions from offline to on-chain.

I hope to be able to share more when the system reaches full maturity — right now I’m tightening up the automation, stability, and protection before revealing any details publicly.

Thanks again for asking — the fact that you didn’t dismiss it outright but looked deeper means a lot.
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