Customise 48HRS: Fast track your customisation. Just add your initials, choose your laces and we'll ship them in 48 hours. The Crosby's design is directly inspired by the climbing shoe, including core elements such as the toe cap is formed by injection molded rubber toe cup, as well as the 3 heel pullers. Made from a stretch knit the shoe has a streamlined design, hugging the foot, allowing complete movement, and maximum comfort. Laces are replaced with a front zipper with a nylon tape. Your sneakers will take 48 hours to ship. We cannot ship footwear made of python or crocodile to California.
Crosby Leather Polyester Track Calf Rubber Customisation Black Swear Fast X0RXd

AbstractAbstract

A convenient and inherently more secure communication channel for encoding messages via specifically designed molecular keys is introduced by combining advanced encryption standard cryptography with molecular steganography. The necessary molecular keys require large structural diversity, thus suggesting the application of multicomponent reactions. Herein, the Ugi four-component reaction of perfluorinated acids is utilized to establish an exemplary database consisting of 130 commercially available components. Considering all permutations, this combinatorial approach can unambiguously provide 500,000 molecular keys in only one synthetic procedure per key. The molecular keys are transferred nondigitally and concealed by either adsorption onto paper, coffee, tea or sugar as well as by dissolution in a perfume or in blood. Re-isolation and purification from these disguises is simplified by the perfluorinated sidechains of the molecular keys. High resolution tandem mass spectrometry can unequivocally determine the molecular structure and thus the identity of the key for a subsequent decryption of an encoded message.

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