‘I Never Held Money with my Teeth’: Constructions of Exemplarity in Abul Fazl Farooqi’s Nasheb-o-Faraz

"I want my money back!" Limiting Online Password-Guessing Financially

Online password guessing attacks are a serious threat to the integrity of online accounts. A common defense is ratelimiting, either by slowing down or blocking connections, or by requiring CAPTCHAs to be solved. Either of these options has serious drawbacks, facilitating denial of service attacks, being circumventable by proxies and CAPTCHA solving services, and offering bad usability to the le...

O-23: "Caring My Family Integrity"

Why can't my GP fix my teeth?

My dentist wants me to see him for a check-up every 6 months. Or at least he would if I had one. Like 44.6% of people in the UK I haven’t got an NHS dentist and I object to paying for one of the few things the government still tells me I should get for free. In fact, the last time I did get to see the dentist it was privately and this particular practice liked to make routine appointments not t...

New Constructions for Quantum Money

We propose an information theoretically secure secret-key quantum money scheme in which the verification of a coin is classical and consists of only one round; namely, a classical query from the user to the bank and an accept/reject answer from the bank to the user. A coin can be verified polynomially (on the number of its qubits) many times before it expires. Our scheme is an improvement on Ga...

Things my mother never taught me.