This program exhibits the backdoor behaviour of PRNG Dual_Ec_Drbg
Switch branches/tags
Nothing to show
Clone or download
Latest commit ce939a8 Dec 27, 2013
Type Name Latest commit message Commit time
Failed to load latest commit information.
.gitignore First POC Dec 26, 2013
0001-Test-enable-debugging-include-bn-functions-in-FIPS-b.patch First POC Dec 26, 2013
Makefile First POC Dec 26, 2013
README First POC Dec 26, 2013
dual_ec_drbg_poc.c First POC Dec 26, 2013


What is it ?

This is a proof of concept over the Dual_ec_drbg backdoor from NSA. It proves that
manipulating only one of the constants is enough to predict output from PRNG.

How to compile

Get the git version of FIPS openssl
git clone git://
cd openssl
git branch fips 4089bd6080d41450adab1e0ac0d63cfeab4a78e7
git checkout fips
git am ../0001-Test-enable-debugging-include-bn-functions-in-FIPS-b.patch

./config fipscanisteronly

If there's something that doesn't compile here... good luck. Do not attempt compiling regular libcrypto together with FIPS, it's not going to work.

cd ..