THE COTI JOURNAL

Privacy.

Stories about practical privacy and how it can fit into travel, spending and daily life.

Oct 19, 2026

Address Poisoning Scams: How They Work and How to Avoid Them

Address poisoning is a crypto scam in which an attacker plants a tiny, zero-value or fake-token transaction in your history,

Oct 19, 2026

A zero-knowledge proof is a way to prove that a statement is true without revealing the information that makes it true.

Oct 16, 2026

Crypto cards work by converting your crypto into regular money, either when you top up or at the moment you pay, so

Oct 15, 2026

Yes, you can book some flights and hotels with crypto, through airlines and travel sites that accept it or through crypto payment

Oct 14, 2026

Crypto payroll means paying employees or contractors in crypto, usually stablecoins such as USDC or USDT. On a public blockchain, every one

Oct 13, 2026

Yes, anyone who knows your crypto wallet address can see its balance and full transaction history on public blockchains such as Bitcoin

Oct 12, 2026

Confidential tokens are tokens whose balances and transfer amounts are encrypted on-chain, so anyone can see that a transfer happened between

Oct 11, 2026

Stablecoin privacy starts close to zero: on Ethereum and similar chains, every USDC or USDT transfer is a public record of sender,

Oct 10, 2026

Stealth addresses let someone pay you without the payment landing on an address the world can tie to you. You publish one