Microdot Technology: Background information when reading Agent Sonya

Summary |  Excerpt |  Reading Guide |  Reviews |  Beyond the Book |  Readalikes |  Genres & Themes |  Author Bio

Agent Sonya

Moscow's Most Daring Wartime Spy

by Ben Macintyre

Agent Sonya by Ben Macintyre X
Agent Sonya by Ben Macintyre
  • Critics' Opinion:

    Readers' Opinion:

  • First Published:
    Sep 2020, 400 pages
    Paperback:
    Jul 2021, 416 pages

    Genres

  • Rate this book


Book Reviewed by:
Kim Kovacs
Buy This Book

About this Book

Microdot Technology

This article relates to Agent Sonya

Print Review

Microdot camera In Agent Sonya, Ben Macintyre's account of real-life spy Ursula Kuczynski, several operatives are said to have used microdots, or tiny pieces of film on which miniaturized text is recorded, to smuggle information to the Soviet Union. Still in use today, these diminutive data caches are produced through a specialized photography process and are so small — about the size of a period or a pinhead — they can be concealed just about anywhere.

The process of shrinking photographs to the point where they can only be viewed via magnification is referred to as microphotography (not to be confused with photomicrography, a technique in which pictures are taken using a microscope). British scientific instrument manufacturer John Benjamin Dancer (1812-1887) is credited with being the first to develop a process by which this could be accomplished. He produced his first miniature photographs, viewable through a microscope, in 1852. They became so popular that they were shown at the London Exhibition a decade later. Unfortunately, no one recognized the potential value of Dancer's invention at the time; the photos were considered merely a novelty, and exactly how he produced them was never recorded.

Parisian photographer René Dagron was the first to patent a process for creating microfilm. In 1864, he published a 36-page booklet that gave details for his process, which involved using regular-sized photographic negatives to make microfilm positives. During the Siege of Paris in the Franco-Prussian War, Dagron proposed to the French government that they use his process to create documents for internal communication that could be sent by carrier pigeon. The government took him up on his offer, paying him 15 francs per 1,000 characters photographed.

In 1925, Israeli physicist and inventor Emanuel Goldberg (1881-1970) published a microfilm production method that created text so small that 50 complete Bibles could be stored per square inch of photograph. He used a microscope to project a smaller version of an already-miniaturized negative onto a slide prepared with a collodion emulsion (a chemical mixture used to set photographs on glass).

As technology continued to evolve, it allowed for easier and more accessible methods of producing microfilm, which made microdots a practical option for transporting documents in secret operations. In one common technique known as the British Method, a photograph of a document was taken by a high-quality 35mm camera on high-contrast film. It was then processed and the resulting negative mounted over a hole cut in a piece of black cardboard, which when lit from behind created a white-on-black image of the original text. This image was then photographed from a distance, creating another image with a tiny dot of text in its center that could then be cut out and transported. During the Cold War, intelligence agencies expanded on microdot technology by developing miniaturized cameras that were easy to conceal and that created microphotographs without the need for obtaining a negative first.

Needless to say, as technology has continued to advance so has the ability to produce microdots. The process has become so simple in our digital world that one of the most common uses for microdots today is equipment identification. Some car manufacturers, for example, spray thousands of microdots all over an automobile, each of which bears the car's VIN (vehicle identification number). Because they're so tiny and there are so many of them, it becomes impossible to remove them all, and so the vehicle is always identifiable. Consumers can even buy inexpensive kits online that consist of unique microdots meant to be placed on one's possessions. If an item is stolen and subsequently retrieved, a microdot can be used to identify its rightful owner.

Microdot camera (Source: CIA)

Filed under Medicine, Science and Tech

Article by Kim Kovacs

This "beyond the book article" relates to Agent Sonya. It originally ran in November 2020 and has been updated for the July 2021 paperback edition. Go to magazine.

This review is available to non-members for a limited time. For full access become a member today.
Membership Advantages
  • Reviews
  • "Beyond the Book" articles
  • Free books to read and review (US only)
  • Find books by time period, setting & theme
  • Read-alike suggestions by book and author
  • Book club discussions
  • and much more!
  • Just $12 for 3 months or $39 for a year.
  • More about membership!

Join BookBrowse

Become a Member and discover books that entertain, engage & enlighten.

Find out more


Today's Top Picks

  • Book Jacket: Yonder
    Yonder
    by Jabari Asim
    The captivating historical novel Yonder turns an intimate lens towards the tragedy and survivorship ...
  • Book Jacket: Churchill's Shadow
    Churchill's Shadow
    by Geoffrey Wheatcroft
    Another book about Winston Churchill? Even with the astronomical number of titles written about the ...
  • Book Jacket: 1000 Years of Joys and Sorrows
    1000 Years of Joys and Sorrows
    by Ai Weiwei
    Ai Weiwei is such an influential and innovative artist and activist that a memoir focused purely on ...
  • Book Jacket: Honor
    Honor
    by Thrity Umrigar
    First Impressions readers enjoyed being transported to India via Thrity Umrigar's novel Honor, with ...

Book Club Discussion

Book Jacket
My Broken Language
by Quiara Alegría Hudes
A Pulitzer Prize–winning playwright tells her lyrical coming of age story in a sprawling Puerto Rican family.

Readers Recommend

  • Book Jacket

    Free
    by Lea Ypi

    "Nothing short of a masterpiece."
    Publishers Weekly

  • Book Jacket

    The Paris Bookseller
    by Kerri Maher

    How a humble bookseller fought incredible odds to bring one of the 20th century's most important books to the world.

Who Said...

On the whole, human beings want to be good, but not too good and not quite all the time

Click Here to find out who said this, as well as discovering other famous literary quotes!

Wordplay

Solve this clue:

A P O B Y Houses

and be entered to win..

Books that     
entertain,
     engage

 & enlighten

Visitors can view some of BookBrowse for free. Full access is for members only.

Join Today!

Your guide toexceptional          books

BookBrowse seeks out and recommends the best in contemporary fiction and nonfiction—books that not only engage and entertain but also deepen our understanding of ourselves and the world around us.