JWT is a solution to a problem 95% of us don't have: https://apibakery.com/blog/tech/no-jwt/
Stripe has been doing that for their public API since forever, and that's one of the big reasons why it is so easy to work with them.
For stripe, though, I'm surprised they wouldn't want to ensure internal data requests are being made on behalf of customers who should actually have access to the data.
Also, for bigger companies (although, why not smaller ones?), you hit a point where you can't keep blindly trusting every service. Better to have internal security controls.
As for when these tradeoffs are appropriate, hard to say. But a good rule of thumb could be when the product is big enough to need an SOA.
And that is my biggest problem. If you don't know whether you need something, you don't need it.
Or you just don't have enough expertise to understand why you need it, but that means you will implement it the wrong way anyway.
That's a bad approach for security.
Starting with the solution is the wrong way to do it, but you certainly need to actively look if you have problems.
Should you do criminal background checks? Install spyware on laptops? Forbid hiring from other countries? Restrict developer access to production env? Invest all your development time into security features until you run out of those?
If you actively look for problems, you will justify all of those.
Security is not about knowing which problems exist and fixing them all. It's about knowing which risks are acceptable at your current stage. If you don't know which risks are acceptable, applying random security practices is worse than no security at all. At least when there's no security you are aware of it.
If you can't come up with an attack vector where HTTP Basic Auth causes significant problems, you don't need JWT to secure communication. And even if you can come up with an attack vector, is it really easiest one to execute?
Speaking of attack vectors, how many of the folks that use JWT for inter-service communication actually rotate encryption keys when anyone who has access to them leaves the company? My bet is very few.
It's a serious question. As time goes on I more and more land on the side of Linus Torvalds wrt to security.
It kills me the amount of stupid shit I've seen done in the name of security.
If security people were to come up with driving standards, no one would be allowed to turn left because it's more dangerous then turning right.
1. An ingress moat - your ingress makes decisions on whether someone should be allowed in, after which internally anything goes.
2. Two-stage auth - building on top of the above, internal messages need authentication/authorization for communication channels to be established. This might be basic, x509, kerberos, or federation-based protocols. Microservices environments might use SPIFFE for this.
3. Messenger auth - in addition to the above, requests need to show evidence of direct/indirect interaction with the parties involved. For example, an access JWT may be sent around since it would provide indication of a user and tenant.
4. Intermediary-authorization - a variation of the above, evidence is required on each communication channel 'hop' that the initiator(s) are authorized to make the request against a service. This may involve more centralized services to create many opaque/integrity-protected authorization decisions from an external systems view.
5. Transactional auth - another variation of 3, evidence is required specifically that a given action is authorized, including parties and potentially parameters. This might be sent directly from the original initiating party, or may be created for internal systems close to the ingress point.
Note that for a service with a public API, all of these can hypothetically look identical. However, once you get to a certain amount of internal authorization checks, you naturally start to try to represent those with integrity-protected stateless tokens to avoid needing a massive centralized system with low latency consistency and high uptime needs. OAuth access and refresh tokens were designed to help there.
https://web.archive.org/web/20180324054020/https://storify.c...
https://twitter.com/FiloSottile/status/1300946068411121665
https://insomniasec.com/blog/auth0-jwt-validation-bypass
https://paragonie.com/blog/2017/03/jwt-json-web-tokens-is-ba...
1) not having to worry about authentication in their app (and not about security issues, exploits, account recovery, fake accounts, bots, ...)
3) the ability to use it in any framework they want (e.g. the Go standard library "framework")
4) the ability to "upgrade" to full microservice authorization
And yes, these are sort-of kind-of not-quite-but-almost provided in Django, Spring and Ruby On Rails, but if you want to use whatever framework you want ... JWT is definitely the closest thing available, or at least it seems so.
WTF? They just spent the whole article talking about how bearer tokens were stupid (everything they said about JWT applies to all bearer tokens). And then they say "instead of this thing we said was stupid, we use the exact same thing but named differently". WTF?
Remember they stated:
> Major advantage of JWT compared to bearer tokens [...] is that they don't require looking up the token.
Other problems with JWTs vs opaque bearer tokens they listed include:
- increased attack surface due to complexity of JSON parsing/validation
- misconfiguring JWT libraries to allow no signature
- leaking data to users because you thought JWTs were encrypted
Now you are right that some of the complexities involved with JWTs like refresh token can apply with arbitrary bearer tokens, especially if you want to limit the lifespan of the access token, but those are implementation choices. Technically you can just have a single long lived bearer token instead of a long lived refresh token, and a short lived access token.
> You should not use Thing X because the advantage it has over Thing Y is not an advantage. In fact both Thing X and Thing Y have the same disadvantage. Except that Thing X has a workaround and Thing Y doesn't. But that workaround adds (gasp!) complexity! Obviously, we only ever use Thing Y and you're a bad developer if you use Thing X.
It's smoke and mirrors. They never give an advantage of bearer tokens over, well, JWT barer tokens, which are a type of bearer token, the thing they said they use. They just said JWTs don't actually have one specific advantage, except when they do. That's not an argument against JWTs!
> increased attack surface due to complexity of JSON parsing/validation
People who use JWTs are already parsing JSON everywhere. It's not hard. If it's not valid JSON, clearly you don't authenticate.
> misconfiguring JWT libraries to allow no signature
You can misconfigure anything. You can misconfigure your server to not actually check the bearer token. Why is it more likely you'll forget to check the JWT signature than the bearer token? This is something you write one time and never touch; it takes an afternoon at most.
> leaking data to users because you thought JWTs were encrypted
Yes, you should not put sensitive data in a JWT, encrypted or not. This is a fair criticism.
> Technically you can just have a single long lived bearer token instead of a long lived refresh token, and a short lived access token.
Which, as they pointed out in that article, is a disadvantage of long-lived bearer tokens.