IAIK-JCE is a crypto toolkit which means "Institute for Applied Information Processing and Communication - Java Cryptography Extension"
The IAIK Provider for the Java Cryptography Extension (IAIK-JCE) is a set of APIs and implementations of cryptographic functionality, including hash functions, message authentication codes, symmetric, asymmetric, stream, and block encryption, key and certificate management. It supplements the security functionality of the default JDK.
See also the official homepage.