In this usage, the term means difficult to guess. An encryption algorithm is intended to be unbreakable (in which case it is as strong as it can ever be), but might be breakable (in which case it is as weak as it can ever be) so there is not, in principle, a continuum of strength as the idiom would seem to imply: Algorithm A is stronger than Algorithm B which is stronger than Algorithm C, and so on.
Smart Clothing is made from fabrics that are wireless and washable that integrate computing fibers and materials into the integrity of the fabrics. Georgia Tech is one university among several, which include MIT and University of California at Davis, that conduct research in the area of intelligent fabric.
SMART CASUAL. Women: Wear a pencil skirt or dress pants, paired with a silk or button-down top and high heels. Men: Opt for dressy trousers, paired with a collared shirt and loafers. When to wear it: office parties, happy hours, business luncheons. DRESSY CASUAL. Women: Avoid wearing denim, tennis shoes, and cotton tees. Instead, opt for silk pants, dress pants, or a skirt. Pair with a patent leather flat, or one with nice embellishments such as a bow, buckle, or a print.