Abstract: An encryption system and method using a set of reversible functions that iteratively reduce the message to be encrypted. In an exemplary embodiment, an encryption module can first receive a data set, or a message, to be encrypted. In a single iterative step, the message can be reduced to a smaller message through the use of a tailored first function, a reduction process. A second function can generate an extra data set based on the message, which can be essential to decrypting the message later. The iterations continue until the reduction process can no longer reduce the message. When the iterations cease, the resulting encrypted message can comprise the extra data sets output during the iterations. Because the utilized functions can be reversible, a decryption module can effect decryption by simply reversing the steps of encryption.