On 11 December 2010, a former government contractor named Gregory Perry sent an email to OpenBSD project leader Theo de Raadt alleging that the FBI had paid some OpenBSD ex-developers 10 years previously to compromise the security of the system, inserting "a number of backdoors and side channel key leaking mechanisms into the OCF". Theo de Raadt made the email public on 14 December by forwarding it to the openbsd-tech mailing list and suggested an audit of the IPsec codebase. De Raadt's response was skeptical of the report and he invited all developers to independently review the relevant code. In the weeks that followed, bugs were fixed but no evidence of backdoors was found. Oracle's proprietary operating system Solaris (originally developed by Sun) features an unrelated product called the Solaris Cryptographic Framework, a plug-in system for cryptographic algorithms and hardware.