A refresh token can help you balance security with usability. Since refresh tokens are typically longer-lived, you can use them to request new access tokens after the shorter-lived access tokens expire.
Why are refresh tokens more secure?
The reason for that is the sensitivity of this piece of information. You can think of it as user credentials, since a Refresh Token allows a user to remain authenticated essentially forever. Therefore you cannot have this information in a browser, it must be stored securely.
Why we use refresh token oauth2?
The Refresh Token grant type is used by clients to exchange a refresh token for an access token when the access token has expired. This allows clients to continue to have a valid access token without further interaction with the user.
Can a refresh token be reused?
When a client uses a refresh token, it always receives a new refresh token for next time. As a result, refresh tokens are only used once. In these scenarios, the reuse of a refresh token triggers all kinds of alarms with the authorization server.
What is PKCE used for?
PKCE is an OAuth 2.0 security extension for public clients on mobile devices intended to avoid a malicious programme creeping into the same computer from intercepting the authorisation code. The RFC 7636 introduction discusses the mechanisms of such an attack.
When should I use refresh token?
So why does a web application need a refresh token? The main reason to use refresh tokens in web applications is to reduce the lifetime of an access token. When a web application obtains an access token with a lifetime of five to 10 minutes, that token will likely expire while the user is using the application.
Does refresh token expire?
By default, access tokens are valid for 60 days and programmatic refresh tokens are valid for a year. The member must reauthorize your application when refresh tokens expire.
Is refresh token a JWT?
js of JWT with refresh token: In this case they use a uid and it’s not a JWT. When they refresh the token they send the refresh token and the user. If you implement it as a JWT, you don’t need to send the user, because it be would inside the JWT.
How does refresh token work?
Once they expire, client applications can use a refresh token to “refresh” the access token. That is, a refresh token is a credential artifact that lets a client application get new access tokens without having to ask the user to log in again.
How do I know if my refresh token is expired?
This can be done using the following steps:
- convert expires_in to an expire time (epoch, RFC-3339/ISO-8601 datetime, etc.)
- store the expire time.
- on each resource request, check the current time against the expire time and make a token refresh request before the resource request if the access_token has expired.
How do I keep my refresh token?
If you worry about long-living Refresh Token. You can skip storing it and not use it at all. Just keep Access Token in memory and do silent sign-in when Access Token expires. Don’t use Implicit flow because it’s obsolete.
Do I need PKCE?
PKCE is better and more secure than the implicit flow (AKA the “token flow”). If you’re using the implicit flow, then you should switch to PKCE. If you use an implicit flow to authorize your Dropbox app, then PKCE is a better, more secure replacement, and you should no longer use implicit flow.
Is PKCE required?
The key difference between the PKCE flow and the standard Authorization Code flow is users aren’t required to provide a client_secret. PKCE reduces security risks for native apps, as embedded secrets aren’t required in source code, which limits exposure to reverse engineering.
Why is PKCE better than implicit?