Collaborate Disseminate
An SSH client obviously authenticates an SSH server in some way. Because when the key of the server changes, the SSH client software gives us a loud warning about the key of the server being changed and this might be a MitM attack.
I am designing a workflow for issuing and acquiring of voucher cards for a client and the chosen technology for the cards has been mifare desfire.
I have a lot of experience with credit cards and we want to make the technolo… Continue reading Securing authenticity of mifare cards, protection against cloning
I have an app installed on customers’ machines, a server, and a regular website between the two. In order not to have the customers configure anything (user credentials, proxy settings…), the app communicates with the serve… Continue reading Is my client challenge authentication secure?
I have an app installed on customers’ machines, a server, and a regular website between the two. In order not to have the customers configure anything (user credentials, proxy settings…), the app communicates with the serve… Continue reading Is my client challenge authentication secure?
I’m learning to configure a simple PPP link with CHAP authentication for two Cisco routers. I’m trying to make sense of how router makes sense of the configuration in this example, as the logic of the configuration seems amb… Continue reading How PPP with CHAP for Cisco works
I’m building an Arduino based radio garage door opener, and in order to protect it from replay attacks I’ve came up with this algorithm:
sender initiates communication
receiver sends a random 32 bit number XORed with a secret key
sender … Continue reading Challenge/response authentication for garage door opener