Package org.bitcoinj.crypto

package org.bitcoinj.crypto
The crypto package contains classes that work with key derivation algorithms like scrypt (passwords to AES keys), BIP 32 hierarchies (chains of keys from a root seed), X.509 utilities for the payment protocol and other general cryptography tasks. It also contains a class that can disable the (long since obsolete) DRM Java/US Govt imposes on strong crypto. This is legal because Oracle got permission to ship strong AES to everyone years ago but hasn't bothered to actually remove the logic barriers.