Researchers in Massachusetts are raising new questions about the security of all multi-tenant cloud environments. The now-patched flaw showed that a hacker could theoretically gain a users secret keys that are used to encrypt sensitive data. Security experts say the risk of this specific attack being used is quite low because the vulnerable encryption library has been patched. The vulnerability is extraordinarily sophisticated on the verge of being magic – but it proves the shortcomings, from a security perspective, of shared environments such as the cloud.”]