Category Archives: informação

What I learned from Whitfield Diffie and Martin Hellman

A few years ago, while attending a “Computer Systems and Networks Security” class, I was talking with a friend of mine. We said to each other: “There’s no way in hell that two principals can exchange a key without a pre-shared key of some sort“. A few minutes later, our professor introduced us to the [...]

LXBus – Obtaining Lisbon bus waiting time information

A few months ago I started using a new service provided by carris to check how much time I have to wait for the bus. Problem is, people at Carris never heard about webservices and rest apis, so I had to send an e-mail and wait for an automated reply with information about waiting times [...]

Browser fingerprinting

Tomei conhecimento do estudo da Electronic Frontier Foundation intitulado “Web Browsers Leave ‘Fingerprints’ Behind as You Surf the Net”, através do Miguel Almeida, mas já vi várias opiniões em vários sítios diferentes. Apesar de achar que os resultados do estudo são de facto preocupantes, acho que se está a exagerar bastante. Ao correr o teste [...]