> For the complete documentation index, see [llms.txt](https://swipeme.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://swipeme.gitbook.io/docs/glossary.md).

# Glossary

* **AlphaUSD, BetaUSD, PathUSD, ThetaUSD** Stablecoins supported by SwipeMe, each backed 1:1 to USD.
* **Biometric Security** Face ID or fingerprint unlock for fast, secure transaction approval.
* **E2E Encryption (End-to-End)** Messages encrypted on your device before sending, decrypted only on recipient's device.
* **Finality** Time required for a transaction to become irreversible (\~0.5 seconds on Tempo).
* **Gas Fees** Network costs to process transactions (\~$0.001 per swap).
* **XMTP** Protocol enabling encrypted messaging across decentralized apps.
* **Self-Custodial** You control your crypto keys/funds directly; no middleman or bank needed.
* **Seed Phrase (12-word)** Your wallet's master password. Write down & secure—losing it means losing access forever.
* **Stablecoin** Cryptocurrency pegged to USD. Holds stable value.
* **Tempo Blockchain** High-speed Layer 1 powering SwipeMe. Handles 100k+ transactions/second.
* **Wallet** Your encrypted account holding stablecoins. Only you control it with your seed phrase.