jPBC

The Java Pairing-Based Cryptography Library (jPBC) is:

• a Java Porting of the PBC library which is the Pairing-Based Cryptography Library written in C and developed by Ben Lynn. It supports symmetric and asymmetric pairing.
• a Java Wrapper of the PBC library so you can delegate all the computation to the C library.

jLBC

The Java Lattice-Based Cryptography Library (jLBC) is a free Java library (released under the GNU Lesser General Public License) that performs the mathematical operations underlying lattice-based cryptosystems.