What Is a Seed Phrase?

A seed phrase (also called a recovery phrase or mnemonic phrase) is a sequence of 12-24 words that can regenerate all private keys in a cryptocurrency wallet. Anyone with your seed phrase controls all the cryptocurrency in that wallet — forever.

Losing your seed phrase means losing access to your funds permanently. Exposing your seed phrase means anyone can steal your funds instantly. The stakes of proper storage cannot be overstated.

Storage Methods Ranked

Tier 1 (Best): Stamped Metal Plates Stamp or engrave your seed phrase into stainless steel or titanium plates. These survive fire (up to 1,500°C), flood, and corrosion. Products like Cryptosteel, Billfodl, and CryptoTag are purpose-built for this.

Tier 2: Paper in Fireproof Storage Write on acid-free paper, laminate it, and store in a rated fireproof safe. Less durable than metal but accessible and simple.

Tier 3: Split Storage Divide the seed phrase across multiple locations. Shamir's Secret Sharing (SSS) allows you to split a secret into N shares where any K shares can reconstruct it (e.g., any 2 of 3 shares). This provides redundancy without single-point-of-failure risk.

Never: • Take photos of your seed phrase • Store in a notes app or text file • Keep in cloud storage (even encrypted cloud storage you don't control) • Send via email, messaging, or any digital communication • Store in a password manager as the sole backup

Emergency Access Strategy

Keep a wallet recovery arrangement separate from your everyday instructions. Record who is authorised to help, where the arrangement is documented and what your person should do first. Do not put seed words into a general family note or combine every recovery factor in one place.

An appropriately secured physical backup or a professionally designed custody arrangement may form part of the plan. Each has different loss, theft and access risks. Multisignature arrangements require careful setup and a tested recovery procedure; adding more keys alone does not make a plan usable.

Use ZeroLatch for a wallet inventory and directions to the separately held recovery process. A missed check-in does not establish death or legal authority. The service sends information after reminders and extra waiting time; it does not transfer assets. Preserve an independent copy and test with synthetic information before relying on any arrangement.