tweakable

Adjective

 * 1) That can be tweaked; moddable, customizable.
 * 2)  Of a block cipher: accepting a second input (the "tweak"), used in conjunction with the key to select the permutation computed by the cipher.
 * 1)  Of a block cipher: accepting a second input (the "tweak"), used in conjunction with the key to select the permutation computed by the cipher.