Best in 7 days
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Ships within 48 hours · Estimated delivery Jun 21 - Jun 26
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Description
Codes and CiphersHow do you make invisible ink? Or disguise your speech? What's the best way of beating frequency analysis? What is a side channel attack? How does RSA end to end encryption actually work? In this illuminating little book, packed with helpful illustrations and worked examples, polymath Steven Goodwin reveals the secrets of the codermakers, and the toolkits of the codebreakers. If you ever wanted to send a secret message, then this book will show you
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.3 ★★★★★
Based on 1342 reviews
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Product Reviews
★★★★★ 5
Well made shower curtain
Color: Grey Striped, Size: 72"W x 72"L (Pack of 1)
It's nice and fits my shower for and good price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 12, 2026
★★★★★ 5
Good product
Color: Grey Striped, Size: 72"W x 72"L (Pack of 1)
Very nicely made
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 10, 2026
★★★★★ 4
Just okay
Color: Grey Striped, Size: 72"W x 84"L (Pack of 1)
Okay curtain, not great, but not bad.
Looks like it has kind of a faint background design. Has a plastic type feel.
Looks okay.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 17, 2025
★★★★★ 5
Pleasantly Surprised!
Color: Grey Striped, Size: 72"W x 72"L (Pack of 1)
I was looking for this exact product but didn’t know it! We recently moved into a new home and had zero window treatments so needless to say I wanted something quick, affordable and not vinyl WalMart blinds. We are happy with our purchase and would highly recommend to others. Some complain of the adhesive not sticking- make sure to clean the window wells/walls etc prior to installing these. If the surface is free of dirt/grease there will be no issues with them staying put.
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Reviewed in the United States on October 14, 2025
★★★★★ 5
Nice
Color: Grey Striped, Size: 72"W x 78"L (Pack of 1)
Very nice material
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Reviewed in the United States on January 27, 2026
