I am the real .... Tom Riddle.

When I was merely 16, I framed Rubeus Hagrid for opening the Chamber of Secrets. Once I made sure that oaf was out of my sight, I then released the Basilisk, killing a girl in the process. Good thing she was a mudblood. 

In the year 1992, I have possessed the blood traitor, Ginny Weasley. As she had not been my original target. My good and faithful servant, Lucius Malfoy, has failed to achieve to get the diary in the hands of Harry Potter.

1994, I killed Cedric Diggory. Meaning to kill Harry Potter, I failed once again. But that doesn't matter.

I see you've found my diary. Use this information wisely.