Unix encryption board

Digging through and sorting my garage I found a couple small white cardboard boxes I must have bought during the auctions after all the bank failures a few years back. Both have a stamp on the box from the "federal deposit insurance corporation" with an identification number, and one is further labeled "Unix encryption board". Inside each box in a static bag are ISA serial boards, and I don't know enough to know what if anything is special about them. UM82C11 in a socket, sticker over one larger chip is Quadrant Components 88 Jun, TD3010 PT6120 M <delta sign> 81301, TC inside a large C with 8744S T24382. Second board has Kouwell KW-524H printed on it, its smaller with a Winbond W86C452P 248NI425630 as the only big chip. Either of these sound like some special or interesting? I am way behind in reading posts, but I will try to fish out any responses, emailing me directly will be a lot more certain. Thanks, hope it something more neat than just a serial card, but not neat enough somebody knocks on my door in a few hours.