Tag: security

MacOS: Add Message to Lock Screen

Published June 22, 2017 by Scott Wilcox

This is a really good idea about adding a message to your lock screen on MacOS with a note on how to contact you in the event your Mac is lost.

Overview of Apple’s iCloud Security & Encryption Features

Published March 24, 2017 by Scott Wilcox

A talk given at Blackhat conference this year explain how Apple ensure that their customer data is safe. You can download a PDF of the slides here.

MET Police Using Indian Hacking Agency

Published March 12, 2017 by Scott Wilcox

.@metpoliceuk used an Indian agency to hack activists and journalists in UK – then shredded the evidence. Just wow. https://t.co/g0Y4RD2SOn — Matthew Butcher (@matthew1butcher) March 21, 2017

OSX – Disable Gatekeeper to Allow Installation of Unsigned Apps

Published March 2, 2017 by Scott Wilcox

Run this in your terminal to allow the option of selecting install from anywhere:

sudo spctl --master-disable

1	sudo spctl --master-disable

Clone a git repo using a specific SSH private key

Published May 22, 2016 by Scott Wilcox

If you wish to clone a repo using a set private key, you can use the following syntax to do just that and it won’t add the private key to your usual SSH settings:

ssh-agent bash -c 'ssh-add private.key; git clone git@server.com:user/repo.git'

1	ssh-agent bash -c 'ssh-add private.key; git clone git@server.com:user/repo.git'

Generating Public & Private Keys Using PHPSECLIB

Published May 21, 2016 by Scott Wilcox

A few tasks that I’ve been working on this weekend have needed public/private key pairs. The very useful phpseclib library provides the tools that you need to generate these within your application.

// Get a new RSA object and set the type, hash and comment
$rsa = new RSA;
$rsa->setPublicKeyFormat(phpseclib\Crypt\RSA::PUBLIC_FORMAT_OPENSSH);
$rsa->setHash('sha256');
$rsa->setComment('user@seccheck');

// Actually generate the key, change 4096 for the desired number of bytes
$keys 		= $rsa->createKey(4096);
$keyPrivate	= $keys["privatekey"];
$keyPublic	= $keys["publickey"];

// Get the fingerprint for this key
$rsa->loadKey($keyPrivate); 
$keyFingerprint = $rsa->getPublicKeyFingerprint();

// Get a new RSA object and set the type, hash and comment

$rsa = new RSA;

$rsa->setPublicKeyFormat(phpseclib\Crypt\RSA::PUBLIC_FORMAT_OPENSSH);

$rsa->setHash('sha256');

$rsa->setComment('user@seccheck');

// Actually generate the key, change 4096 for the desired number of bytes

$keys = $rsa->createKey(4096);

$keyPrivate = $keys["privatekey"];

$keyPublic = $keys["publickey"];

// Get the fingerprint for this key

$rsa->loadKey($keyPrivate);

$keyFingerprint = $rsa->getPublicKeyFingerprint();