Books
“The Code Book” by Simon Singh
A fascinating and remarkably accessible history of cryptography that ends with a $15,000 contest.
Toward the end of August, an international team of computer scientists succeeded in breaking a 155-digit number into its two prime factors. The feat was significant because public-key cryptography — the system of encryption that ostensibly guards the privacy of most Internet traffic today — depends on the difficulty of factoring a very large number. True, it took 292 computers seven months to factor that number. But the mere fact that the problem was solvable in a finite period — as opposed to, say, 43 times the age of the universe — was enough to show that the current level of security can, and ultimately will, be penetrated.
This latest blow in the struggle between code makers and code breakers comes as a timely epilogue to “The Code Book,” Simon Singh’s fascinating and remarkably accessible history of cryptography. Tracing the development of secret writing from the fifth century B.C. to the present and beyond, Singh recounts a series of theoretical and practical breakthroughs, each followed by a matching counterstroke in an ongoing intellectual tennis match. The “evolution” of his subtitle, in fact, is analogous to the biological arms race that develops over time between predators and their prey, or pathogens and their hosts. Each time a technological advance makes a new level of secrecy in encrypted writing possible, the code makers have the upper hand; but eventually the code breakers locate a flaw in the new system, making secure communications an iffy proposition again.
Singh begins his story with the simple alphabetic cipher, a letter-by-letter encoding that lives on today in the humble cryptogram. (It’s amazing to consider that what is now an amusement in the daily newspaper was used as recently as the Renaissance to conceal top-level diplomatic correspondence.) Cryptograms, of course, can be easily broken by “frequency analysis” — assuming, for instance, that the most common letter in a long English message stands for E. Singh goes on to the Vigenhre cipher, hailed in the 19th century as “the indecipherable cipher,” which improved on that system by using several different cipher alphabets in rotation, but it, too, ultimately proved fallible. He then proceeds to describe the penetration of the Germans’ Enigma code during World War II and, ultimately, with the rise of the computer and electronic communications, the 1970s development of public-key cryptography. He also includes a compelling detour into the great achievements in historical code breaking: the decipherings of the Rosetta Stone and the Linear B inscriptions of the Minoan civilization.
Singh, the British science journalist who wrote the popular “Fermat’s Enigma,” has a gift for explaining the nuts and bolts of even the most intricate cryptographic systems; it is nothing short of astonishing to watch the Enigma cipher crumble before your eyes through a series of logical deductions that a lay reader can easily follow. At the end of the book, in a sort of promotional-
Singh goes beyond the technical details of cryptography to profile the people behind the codes; his book is full of enlivening biographical details and deft portraits of some of the quirkier figures in the history of mathematics, computer science, archaeology and diplomacy. He is scrupulous, too, about giving credit not just to the marquee names but to the lesser-known figures in the story of cryptography as well: His account of the Enigma decoding, for instance, recognizes the work of the British intelligence service and the brilliant mathematician Alan Turing, but also explicates the essential foundations laid by an obscure Polish statistician named Marian Rejewski.
The book’s lone false note comes at the end, when Singh contemplates the cryptographic advances based on quantum physics that may appear in the 21st century. He seems to take seriously the likelihood that a truly unbreakable cipher is on the horizon — this after 300 pages detailing the history of just such a fantasy. It’s possible, of course, that complete privacy may yet be achievable. But nothing in “The Code Book” supports the idea.
Joshua Kosman is a writer for the San Francisco Chronicle. More Joshua Kosman.
“The Aleppo Codex”: The bizarre history of a precious book
A reporter traces the shadowy fate of the definitive version of the Hebrew Bible
Matti Friedman An ancient and priceless book, a murky history of evasions and coverups, an underground of sinister and possibly violent dealers, a former spy who drops tantalizing hints and a wily 84-year-old millionaire who says stuff like, “The problem with this story is that it could damage your health”: Are these the ingredients for a cheesy, improbable historical thriller? Yet “The Aleppo Codex,” Matti Friedman’s account of his attempts to learn the history of one of the world’s most precious books, sports all of these assets, and it’s nonfiction. If reporting this story damaged Friedman’s health, it probably happened when he realized what he’d stumbled into and his reporter’s heart started beating in doubletime.
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Laura Miller is a senior writer for Salon. She is the author of "The Magician's Book: A Skeptic's Adventures in Narnia" and has a Web site, magiciansbook.com. More Laura Miller.
Augusten Burroughs: Conquer trauma by letting it go
Salon exclusive: The best-selling memoirist says past horrors haunt us because we think about them too much. Stop
Augusten Burroughs Many people continue to feel influenced and even controlled by the things that happened to them a long time ago. Sometimes, people harbor dark, traumatic memories from childhood. Or fragments of memories — incomplete scenes, uncomfortable feelings, perhaps even a sense of certainty that something specific and terrible happened to them, but little more than this.
Others experienced something traumatic in adulthood that continues to affect them day to day many years later. Maybe an assault has left a person afraid to leave their home or enter a particular neighborhood.
Continue Reading CloseAugusten Burroughs' many books include "Runnning With Scissors," "Dry," "Sellevision," "Magical Thinking" and "Possible Side Effects." His latest book is "This Is How." More Augusten Burroughs.
Why did we move to Paris?
Leaving New York seemed ideal. Until the crazy landlord, topless exams, the French flu, the lack of credit cards...
Rosecrans Baldwin Paris’s neighborhoods, the arrondissements, are organized like a twist. They spiral from the river like toilet water flushing in reverse and erupting out of the bowl — a corkscrew or what have you, a flattened pig’s tail, a whorling braid notched one to 20. But if you walk from one neighborhood to the next, there is little to suggest the numbers changing. So it was confusing. Anyway, if you began in the middle of the Seine and snaked around, we lived on the Right Bank in the top of the third arrondissement, called the haut Marais, the upper Marais, on Rue Béranger, a quiet little street curling down from Place de la République.
Continue Reading CloseRosecrans Baldwin is a founding editor of The Morning News. His first novel, "You Lost Me There," was named one of NPR's Best Books of 2010. His latest book is "Paris I Love You, But You're Bringing Me Down." More Rosecrans Baldwin.
Robert Caro’s bloated LBJ biography
Robert Caro's latest LBJ tome has everyone -- even Bill Clinton! -- hyping it. They've been had
“Even the President of the United States sometimes must have to stand naked.” When Bob Dylan wrote that line in 1964, the naked emperor was Lyndon Johnson, which makes that image perhaps the most disturbing in all of Dylan’s apocalyptic work.
By stripping down Lyndon Baines Johnson to his essence, Robert Caro has himself become an American legend. Since the publication of “The Path to Power” in 1982, Caro has transformed LBJ’s life into a cautionary tale of Shakespearean dimensions. In some wonky circles, the release of a new volume is heralded like the Summer of Love release of “Sgt. Pepper’s.” Can Caro possibly top his “Revolver”?”
Continue Reading Close“Bring Up the Bodies”: Hilary Mantel’s power play
The sequel to her Booker-winning "Wolf Hall" is a thrilling exploration of what it took to run Tudor England
“Bring Up the Bodies,” Hilary Mantel’s follow-up to her Man Booker Prize-winning 2009 novel, “Wolf Hall,” is a high-wire act, a feat of novelistic derring-do. Mantel makes bold not with form — by now meaningful experimentation in that area seems exhausted — but with the very material that brings most readers to novels in the first place: our imaginative identification with fictional characters and the experiences we feel we’re sharing with them.
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Laura Miller is a senior writer for Salon. She is the author of "The Magician's Book: A Skeptic's Adventures in Narnia" and has a Web site, magiciansbook.com. More Laura Miller.
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