Digital watermarking techniques have been used for preventing an illegal copying and re-distributing of contents. A collusion attack is a strong attack against digital watermarking schemes. To prevent such attacks,a collusion secure fingerprint code can be used. Collusion secure fingerprint code have been studied widely and many codes have been proposed. However, a code length of them are too long to embed it into a content using digital watermarking. In this paper, we propose a very short 3-secure fingerprint code. The code length is 128 bit. The tracing algorithm is based on a group testing algorithm. The feature of the tracing algorithm is that the tracing algorithm is deterministic. We evaluate the performance of the code by a computer simulation. The results of the simulation show that the success probability of the code is about 99.43 % against major three attacks.