Proxy re-encryption

Posted on by David Vassallo

What is proxy re-encryption? Proxy re-encryption lets Alice send Bob a message (M) via a semi-trusted proxy, without revealing Alice's private key to either the proxy or Bob, and without revealing the secret message to the proxy. As Wikipedia puts it: "Proxy re-encryption schemes are cryptosystems which allow third parties (proxies) to alter a ciphertext … Continue reading Proxy re-encryption

Using Let’s Encrypt manual mode

Posted on by David Vassallo

Let's Encrypt is a service sponsored by web giants such as Facebook, Google Chrome, and Cisco (https://letsencrypt.org/). Let's Encrypt has recently gone into public beta and is extremely easy to use. It has some modules already built in to integrate directly with popular webservers like Apache. In my case, I had two use cases where … Continue reading Using Let’s Encrypt manual mode