An exposed apt signing key and how to improve apt security

A recent bug bounty report revealed that a private key used for pkg.cloudflareclient.com was exposed. The company has since rotated the key and is taking steps to prevent similar issues in the future. This incident highlights the importance of proper security measures when using third-party repositories, as an improperly secured private key can have consequences beyond one repository. To improve the security of apt with third-party repositories, users should ensure that keys are only trusted for specific sources and use https to further secure their packages.