Abstract: A variant on the ‘One Time Pad’ cipher is used to provide an encrypted link between two or more stations. The main feature of this variant is the use of a unique and easily created Pseudo-Random Number Sequence segment not having any internal repeats. At one station, a mixing function is used to combine a locally created stream of truly random bytes with a portion of this unique PRNS segment, yielding a fresh stream of truly random data. This freshly created stream of truly random data is operated on in such a way as to create a new and unique PRNS element set which is used to control the functioning of a PRNS generator. The PRNS generator is used to create a new and unique PRNS segment which has a repeat period much longer than the length of the PRNS element set used to create it. It is then useful to treat the PRNS element set as a message and transfer it across the encrypted link to other stations.