A hardware cryptographic key in the form of a small SD-card-like PCB for a Teltron SP-810 voice encryption device from the late 1970s. Via Cryptography Museum.
Software, hardware, art – a blog of process and findings
A hardware cryptographic key in the form of a small SD-card-like PCB for a Teltron SP-810 voice encryption device from the late 1970s. Via Cryptography Museum.