PROXIMITY CARD READER – Access control is one of the most important aspects of physical security. Confidential assets can be compromised if they are improperly hand… Read More

Both advantages and disadvantages of proximity card readers for access control For many access control systems, proximity readers are a common option. Yet, what exactl… Read More

1. What is access control security? Access control is a method of security which restricts access to a place or resource, by only allowing authorised members access. Physical access contr… Read More

The resurrected 25-MHz signal of time and frequency standard station WWV is now emanating from a circularly polarized turnstile antenna. WWV had used a vertically polarized antenna on 25 MHz… Read More