Authoritative, source-linked definitions for 26 key terms in Monero, cryptocurrency privacy, and related cryptography. Each term links to the primary source documentation.
Monero is a decentralized, open-source cryptocurrency launched in April 2014 that focuses on privacy, decentralization, and fungibility. Every transaction obscures the sender, receiver, and amount by default through ring signatures, stealth addresses, and Ring Confidential Transactions (RingCT).
A digital signature scheme that lets a signer prove they belong to a group of possible signers without revealing which member produced the signature. Monero uses ring signatures to hide the actual sender of a transaction among a group of decoy outputs.
A one-time public address generated for each transaction so that only the sender and receiver can identify it. Stealth addresses prevent observers from linking multiple payments to the same recipient on the Monero blockchain.
A protocol that hides the amount transferred in a Monero transaction using Pedersen commitments and range proofs, while still letting the network verify that no money is created or destroyed. Activated on Monero in January 2017.
Compact zero-knowledge range proofs that replaced the original Borromean range proofs in Monero in 2018, reducing transaction size and verification cost by ~80%. Bulletproofs+ further improved efficiency in 2022.
Concise Linkable Spontaneous Anonymous Group signatures — the ring signature scheme that replaced MLSAG on Monero in October 2020. CLSAG made signatures ~25% smaller and verification ~10% faster while preserving the same security model.
Monero's ASIC-resistant proof-of-work algorithm, deployed in November 2019. RandomX uses random code execution and memory-hard techniques optimized for general-purpose CPUs, keeping mining decentralized and accessible.
An additional address derived from a single Monero wallet that lets users receive funds without exposing their main public address. Subaddresses are unlinkable on-chain and have replaced legacy payment IDs as the recommended way to identify incoming payments.
A pair of keys (public/private view) that lets a third party see incoming transactions to a Monero wallet without being able to spend funds. View keys are used for auditing, wallet syncing on untrusted devices, and providing selective transparency.
The private key that authorizes spending funds from a Monero wallet. Anyone holding the private spend key has full control of the wallet, so it must be kept secret. The spend key is one half of the pair derived from the wallet's mnemonic seed.
A human-readable sequence of 25 words that fully encodes a Monero wallet's private keys. Backing up the mnemonic seed (offline, multiple physical copies) is the recommended way to preserve wallet recovery capability.
The average interval between successive blocks on a blockchain. Monero targets a 2-minute block time (vs. 10 minutes for Bitcoin), which yields faster confirmations for everyday payments.
A perpetual block reward of 0.6 XMR per block (~0.87% annual inflation, decreasing over time) that activated on Monero in June 2022, after the main emission curve concluded. Tail emission ensures miners always have an incentive to secure the network without relying purely on transaction fees.
A trustless cross-chain trade between two cryptocurrencies (e.g., BTC ↔ XMR) that either completes for both parties or refunds for both, with no intermediary required. Atomic swaps use Hash Time-Locked Contracts (HTLC) and adaptor signatures.
A peer-to-peer transaction broadcast protocol that obscures the originating IP of a transaction by relaying it through a randomized "stem" path before public diffusion. Activated on Monero in 2020 to harden network-level privacy.
A decentralized mining pool for Monero where miners run their own pool node and earn rewards directly from the chain, eliminating the trust and centralization of traditional pools. P2Pool gained significant hashrate share starting 2021.
Tor (The Onion Router) is an anonymity network that routes traffic through multiple encrypted relays. ".onion" addresses are special hidden-service URLs reachable only via Tor. MoneroSwapper operates a v3 .onion mirror for users seeking maximum network-level privacy.
A regulatory compliance process where financial services collect identity documents (passport, address proof, selfies) from users. No-KYC platforms like MoneroSwapper do not require this verification, prioritizing user privacy.
A framework of laws and procedures designed to prevent the conversion of illicit funds into legitimate assets. AML rules typically mandate KYC, transaction monitoring, and reporting requirements on regulated crypto exchanges.
An upcoming Monero protocol upgrade that replaces fixed-size 16-member ring signatures with proofs that the spent output belongs to the entire set of valid outputs in the chain. FCMP++ will dramatically increase the anonymity set per transaction.
A next-generation Monero transaction protocol (Seraphis) and address scheme (Jamtis) under development. Seraphis modernizes the cryptographic structure of transactions; Jamtis introduces enhanced address types with tagged outputs and improved wallet performance.
The pool of unconfirmed transactions broadcast to the network but not yet included in a block. Miners select transactions from the mempool (typically prioritizing higher fees) when assembling new blocks.
A block that has been added to the chain after a transaction was first included. Each additional confirmation makes the transaction more difficult to reverse. Monero typically requires 10 confirmations (~20 minutes) for full finality on exchanges.
In Monero ring signatures, decoys (also called mixins) are real outputs from past blocks that are mixed with the actual spent output to obscure which one is being signed. The current ring size is 16 (15 decoys + 1 real spend).
A unique cryptographic identifier published with each Monero transaction, derived from the spent output. Key images prevent double-spending: a duplicate key image on-chain immediately reveals an invalid transaction without disclosing which output was spent.
The property that any unit of a currency is interchangeable with any other unit. Monero is fungible because all coins are indistinguishable on-chain (identical privacy guarantees), unlike Bitcoin where transparent histories can taint individual coins.
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