The Valencia fullback moves to Anfield for the 2013-14 campaign and is confident that he can achieve "big things" during his time with Brendan Rodgers' side.
The former Lyon fullback will take the No. 20 shirt at Anfield and becomes the club's fifth signing of the summer, with the likes of Iago Aspas, Luis Alberto, Simon Mignolet and Kolo Toure all having arrived earlier in the window.
"I'm very happy to be here. I think we have a great team and great fans and together we can achieve big things," Cissokho told the club's official website. "It's going to be a great experience to be able to rub shoulders with the club's top-quality players. I have experience in the game, but coming here there will still be lots of things to learn and discover as I work with everyone every day.
"I can learn from my new manager, get to know the new style of play here, familiarize myself with different opposition teams and learn the language.
"It's going to be a great experience for me, and of course playing for the club for the first time is something I'm excited about."