What belongs offline, and what does not
- Author
- CRYPTO PORT Editorial
- Published
- Updated
- Reading time
- 6 min
In short
Offline storage trades away the risk of remote theft and takes on the risk of physical loss and disaster instead. Keys such as seed phrases belong offline only; records you consult often can take advantage of online convenience.
Key points
- Seed phrases and private keys go on offline media only — paper or metal
- No photos, no cloud, no email, no password manager for keys
- Offline is vulnerable to fire, water and misplacement — keep copies in separate places
- Transaction records are consulted often and need not be offline-only
Definition
Keeping information on media that never touch a network — paper, metal, offline storage — immune to remote intrusion but exposed to physical risk.
The advantage of offline storage is simple: what is not connected cannot be stolen remotely. A compromised cloud account or a machine full of malware cannot reach a sheet of paper in a drawer. That single fact is the whole case for keeping crypto keys offline.
So restrict seed phrases and private keys to offline media. Handwritten on paper, or stamped into a metal plate if fire and water are concerns. What to avoid: photographing them, saving them to cloud storage, emailing them to yourself, or typing them into a password manager. All four are convenient, all four are reachable over a network, and none were designed on the assumption that they would hold keys.
Offline has its own failure modes, though. Paper burns, floods make it illegible, moving house loses it, and someone who does not know what it is throws it away. The answer is copies in separate places — your home and a relative's, your home and a safe deposit box — so that one incident cannot take everything.
What should not go offline? Transaction CSVs, wallet inventories, address books. You consult and update these often, and a paper-only version simply goes stale. Use online convenience for them, and encrypt them if the contents warrant it. Sorting your material into these two buckets is what makes the practice workable.
The test is whether the item alone can move funds. If it can — it is a key — it stays offline. If it cannot, convenience may win. That one line resolves most of the judgement calls.
Watch out for
- · Do not photograph, cloud-store, email or password-manage a seed phrase
- · Paper is vulnerable to fire, water and loss — plan on copies in separate places
- · Offline media get thrown out by people who do not know what they are, so the location needs to be communicated deliberately
Frequently asked questions
Do I need a metal plate? Is paper not enough?
Paper works if it is stored thoughtfully. Metal resists fire and water, which matters for long holding periods in uncertain conditions. Either way, having copies in separate places matters more than the material.