Embarcadero has teamed up with Roman Kassebaum to upgrade the TurboPower Lockbox encryption components to Delphi XE7 Firemonkey. The components are open source and support Android, IOS, OSX, and Windows (should also compile under Appmethod and C++Builder). The encryption components contained in the library support AES, DES, 3DES, Blowfish, Twofish, SHA, MD5, a variety of chaining modes, RSA digital signature and verification. The actual non visual components which show up when you install the package are: TlbBlowfish, TLbDES, TLb3DES, TLbRinjndael, TLbRSA, TLbMD5, TLbSHA1, TLbDSA, and TLbRSASSA. All of the components are implemented in Object Pascal so there are no third party libraries that are required for your use. Additionally they are open source under an Mozilla Public License 1.1. Check out two blog posts about the release here and here.
Head over to SourceForge and download the free encryption library for Delphi XE7 Firemonkey.
Update: Here is a mirror of the LockBox download for Delphi XE7.