Yahoo hack wasn't Shellshock, company claims, The Independent

Malware attack was not Shellshock, and no user data was affected, Yahoo said

It took three years for Yahoo to tell us about its latest breach. Why does it take so long? - The Washington Post

The Shellshock command security flaw isn't really fixed yet

Were the Russians Behind the Massive Yahoo Email Hack?

All 3 Billion Yahoo Accounts Were Affected by 2013 Attack - The New York Times

Information Security Resources

Epilogue A.D.: New Orleans After The Deluge

Castle Guard Certification

Yahoo confirms 'state-sponsored' hackers stole personal data from 500m accounts, Yahoo

It's strange Yahoo took 2 years to discover a data breach, security experts say - Los Angeles Times

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