symmetric

Same as symmetrical.

Symmetrical.

Symmetrical.

Of a relation R on a set S, such that xRy if and only if yRx for all members x and y of S (that is, if the relation holds between any element and a second, it also holds between the second and the first).

Using the same key (or keys that are trivially related) for both encryption and decryption.

having similarity in size, shape, and relative position of corresponding parts