Описание: Physician and geologist Peter Cormack Sutherland (1822-1900) served as surgeon on the 1850-1 expedition led by William Penny in search of Sir John Franklin. Published in 1852, this two-volume account includes the poignant discovery of Franklin`s winter quarters at Beechey Island and the graves of several men.
Описание: This accessible introduction for undergraduates explains the cryptographic protocols for privacy and the use of digital signatures for certifying the integrity of messages and programs. It provides a guide to the principles and elementary mathematics underlying modern cryptography, giving readers a look under the hood for security techniques and the reasons they are thought to be secure.
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