Collaborate Disseminate
I read the following piece of code:
dd if=/dev/urandom bs=16 count=1 2>/dev/null | md5sum
Apparently, this code was used as a trick to produce a hex string key from a 128-bit binary pseudo-random value.
Someone here cl… Continue reading Is there a loss of entropy by hashing an N-bit random key to produce an N-bit hash?
For an embedded system, I plan to accept incoming connections to the device using the Bluetooth RFCOMM protocol. RFCOMM is basically RS232 over Bluetooth. When a client connects, it will start receiving over the air the strea… Continue reading Is there something inherently insecure in leaving "page and inquiry scan" enabled for an extended period of time on a Bluetooth device?
I’m recording a video about installing some software from a vendor repository. At some point, I download the GPG key for the remote repository and check manually its fingerprint before adding key and the new repository to the… Continue reading When installing a new software repository, is it required to check the repository key fingerprint?