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5 years ago

x - Faculty of Computer Science - Technische Universität Dresden

x - Faculty of Computer Science - Technische Universität Dresden

• … a new Web 2.0

• … a new Web 2.0 service The Server as Attacker • … for people which like city journeys • … find cool cities and places like shops, restaurants, hotels etc. • ... information from globe-trotters for globe-trotters • … they can share their knowledge after secure login • So that’s wrong? �It collects (username,password) and tries to login into other popular services like Gmail, Twitter, eBay, Amazon etc. password rule: never “reuse” passwords! 93

Password based authentication • Simple approach – security problems User Attacker might get access! (dog,bone) Server Login Password … … dog h(salt,bone) … … ≟ 94 yes grant access no deny access

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