- The World's First Internet Currency (since 1994) -

- UNDollar.org Blog/Whitepaper -


  • Dec, 09, 2025:

    UNDollar Foundation => UN-Coins Foundation

    Today we have renamed our UNDollar Foundation to UN-Coins Foundation.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • Dec, 08, 2025:

    Post-Quantum (PQ) Blockchain for UN-Coins

    Our GitHub Repository

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • Dec, 06, 2025:

    Post-Quantum (PQ) Blockchain

    Our Gold- and Silver-Coins, minted and issued based on Taproot Assets over the Lightning Network via the Bitcoin Blockchain, would be built on sand in the long run (5 to 10 years), because Quantum Computers can then may be hack the conventional blockchain cipher.

    Therefore we have decided to develop our own Open Source Post-Quantum (PQ) Secure Blockchain for our UN-Coins.

    Level 1 of our UN-Coin PQ Blockchain will be developed in Rust, using the Rust wrapper of the Open Source C library liboqs for the Post Quantum NIST ciphers Kyber (Key Exchange) and Dilithium (Signatures)

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • Nov, 27, 2025:

    TAPD 0.7

    On Nov, 20, 2025 there has been released the version 0.7 of the Taproot Assets Daemon tapd by Lightning Labs. We are waiting for the version 1.0.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • Nov, 25, 2025:

    Trezor Security

    When your PC crashes, the private keys on your Trezor device are safe. When your Trezor device gets lost, you can restore your private keys with another Trezor device and your Seed Phrase. You can store your Seed Phrase on a metal, fireproof device.

    The Trezor Safe 3 hardware wallet can be bought for 47 EUR Black-Friday price.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • Nov, 15, 2025:

    UN-Coin Fixing in EUR and USD

    From today on, we are fixing our UN-Coin in EUR and USD. The UN-Coin will become a Crypto Coin. The price at the moment is oriented towards 1 oz Fine Silver.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • Oct, 21, 2025:

    Trezor Safe 7

    Satoshi Labs announced the Trezor Safe 7 with a new security chip for the post-quantum era. Gain protection against future threats with the first-ever hardware wallet built with quantum-ready architecture.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • Oct, 20, 2025:

    Quantum Computers

    Krown Technologies & Quantum eMotion Announce the Official Launch of Qastle - The World's First Quantum-Secured Hot Wallet for the Masses, on November 1st, 2025

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • Oct, 02, 2025:

    Back to the roots: Silver-Dollar

    Back to the roots! One UN$ is one oz Fine Silver again. The UN$ now shall be a Silver Crypto Coin!

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • Sep, 06, 2025:

    Multi-User WebWallet

    We are planning a Multi-User WebWallet for our UN$ Coin; running on a cluster of 5 Bare Metal AMD EPYC Linux servers, with geo-redundant S3 backups. It will be written in PHP (like Facebook) and Go; with the Database Management System (DBMS) PostgreSQL.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • Aug, 18, 2025:

    Rust instead of PHP?

    We intended to develop our new UN$ cryptocurrency system with the Bitcoin Blockchain, the Lightning Network, Taproot Assets, the programming language Rust and PostgreSQL. Within a few hours ChatGPT has created over 50 Rust code pages. A human programmer would need about half a year for this task. But the Rust libraries Axum, Leptos and SQLx are still beta software. Therefore we have decided, to stick with PHP and to write a PHP extension in Rust, if necessary. If we would once hit a PostgreSQL performance wall, we would scale horizontally with Citus, owned by Microsoft. But we prefer, to scale vertically, if possible (less machines :-)).

    Our Limit isn't our Budget, but Time and Know-How. With ChatGPT we gain Time and Know-How. Thank you, dear OpenAI Foundation!

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • Aug, 12, 2025:

    Taproot Assets

    What is Taproot Assets in Bitcoin?

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • June, 27, 2025:

    UN$ = Gold+ Coin

    Our UN$ is no Gold Stablecoin, but a Gold+ Coin, which attempts to have an outperformance against Gold. This is achieved by investing the income by selling it, 1:1 in physical Gold and Stocks. Our Stocks Wikifolio has an average annual performance of about 60% at the moment. The initial selling price of the UN$ is 1/100 oz Fine Gold in USD.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • June, 06, 2025:

    Dual Cryptosteel Capsules

    Our dual pack Cryptosteel Capsules , for secure storing of wallet seed phrases and of passwords, has arrived today. It came from Poland via DHL together with a small Bitcoin User Manual. We have ordered the two capsules via Amazon.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • June, 06, 2025:

    Bitcoin Core Server Update

    Today we have updated our Bitcoin Core Server from the version 26.1 to the version 28.1.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • June, 03, 2025:

    Trezor Safe 5

    Today our Trezor Safe 5 has come per UPS from SatoshiLabs in Prague. He is protected by an orange silicon Bumper. We will first develop a Web-Wallet and lateron, when Trezor supports Taproot Assets, we will connect the Trezor Safe 5 with our Web-Wallet.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • June, 03, 2025:

    Offer / Contact Form

    We have a new Offer / Contact Form.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • June, 01, 2025:

    Trezor hardware wallets

    The integration of a Secure Element chip in the Trezor Safe 3 and Safe 5 by SatoshiLabs provides:
    - Enhanced Physical Security: Protection against hardware-based attacks.
    - Improved PIN and Device Authentication: Additional layers of security for user verification.
    - Maintained Open-Source Integrity: Transparency and community trust through open-source firmware and hardware design.
    These advancements make the Safe series a robust choice for users seeking heightened security in their cryptocurrency hardware wallets.

    You can combine it with a Cryptosteel Capsule for securely storing of seed phrases. At Amazon you can buy the former "Capsule" model for a special price.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • May, 24, 2025:

    Wikifolio: 39.3% per year

    Our Wikifolio does have an average performance of 39.3% per year (at the moment).

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • April, 29, 2025:

    1 UN$ = 1/100 oz Fine Gold

    Since today 1 UNDollar equals to 1/100 Ounce (oz) Fine Gold, about 1 oz Fine Silver. 1 UNDollar consists of 100 million UNOs. (1 Bitcoin consists of 100 million Satoshis).

    We are now operating a Bitcoin Core server with the Bitcoin blockchain.

    First only Central Banks can buy UNDollar crypto coins.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • February, 18, 2025:

    $TRUMP Coin

    The $TRUMP coin is a cryptocurrency launched by President Donald Trump on January 17, 2025, just days before his second inauguration. Hosted on the Solana blockchain, the coin was introduced with an initial supply of one billion tokens. Within 2 days it skyrocked more than 100% to over 70 US$.

    As of today, the price of the $TRUMP coin varies slightly across different cryptocurrency exchanges. On Kraken, $TRUMP is trading at $15.99, Coinbase lists the price at $16.52. Binance reports a price of $17.32, with a 24-hour trading volume of $1.65 billion.

    This was a typical IPO pattern, which also happens with stocks.

    The Solana (SOL) blockchain is used by VISA and may be by PayPal too in the future.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • February, 14, 2025:

    UN-Dollar CryptoCoin

    Our board of directors has decided, to convert the UN-Dollar into a Bitcoin compatible CryptoCoin.

    The UNDollar CryptoCoin is based on the Bitcoin Lightning Network. This Blockchain supports millions to billions transactions per second (tps). The transaction fees are less than one US$-Cent per transaction and they are payed in Satoshis.

    A Sathoshi (sat) is the smallest unit of Bitcoin (BTC). It represents 0.00000001 BTC (1 hundred-millionth of a Bitcoin). 1 BTC = 100,000,000 Satoshis.

    The UN$ transactions will not be stored in a SQL database any longer, but encrypted on the decentralized Bitcoin blockchain.

    Since today we are beta-testers of the Joltz-Wallet.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • January, 05, 2025:

    Silver Krugerrand

    1 oz silver coins, for example the Silver Krugerrand can be bought in Germany from Degussa. Silver is the ideal currency, when all other currencies are crashing ("Notgroschen"). You can still buy something to eat for it.

    Willi Rauffer, Chairman of the UN-Coins Foundation


  • January, 01, 2025:

    New Year Quote

    What the New Year brings to you, will depend a great deal on what you bring to the New Year.

    Rudolf Niedermeier, CEO of the UN-Coins Foundation


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