Visual cryptography is a cryptographic technique which allows visual information (pictures, text, etc.) to be encrypted in such a way that the decrypted information appears as a visual image. One of the best-known techniques has been credited to Moni Naor and Adi Shamir, who developed it in 1994. They demonstrated a visual secret sharing scheme, where an image was broken up into n shares so that only someone with all n shares could decrypt the image, while any n − 1 shares revealed no information about the original image. Each share was printed on a separate transparency, and decryption was performed by overlaying the shares. When all n shares were overlaid, the original image would appear. There are several generalizations of the basic scheme including k-out-of-n visual cryptography, and using opaque sheets but illuminating them by multiple sets of identical illumination patterns under the recording of only one single-pixel detector. Using a similar idea, transparencies can be used to implement a one-time pad encryption, where one transparency is a shared random pad, and another transparency acts as the ciphertext. Normally, there is an expansion of space requirement in visual cryptography. But if one of the two shares is structured recursively, the efficiency of visual cryptography can be increased to 100%. Some antecedents of visual cryptography are in patents from the 1960s. Other antecedents are in the work on perception and secure communication. Visual cryptography can be used to protect biometric templates in which decryption does not require any complex computations. (Wikipedia).
Steganography Tutorial - Hide Messages In Images
Steganography is the hiding of a secret message within an ordinary message and the extraction of it at its destination. Steganography takes cryptography a step further by hiding an encrypted message so that no one suspects it exists. Ideally, anyone scanning your data will fail to know it
From playlist Ethical Hacking & Penetration Testing - Complete Course
An informal introduction to cryptography. Part of a larger series teaching programming at http://codeschool.org
From playlist Cryptography
Convincing - Applied Cryptography
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
From playlist Applied Cryptography
Randomness Quiz - Applied Cryptography
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
From playlist Applied Cryptography
Symmetric Cryptosystems - Applied Cryptography
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
From playlist Applied Cryptography
Tech Talks 2021: Cryptography in the Wolfram Language and Upcoming MOOC
Cryptography Developer Dariia Porechna shares her experience of writing about cryptography and how the Wolfram Language allows to deliver a unique hands-on educational material on the matter. Connect with and follow Dariia Porechna: LinkedIn: https://www.linkedin.com/in/dariia-porechna L
From playlist Tech Talks: Wolfram Virtual Technology Conference 2021
The one-time pad | Journey into cryptography | Computer Science | Khan Academy
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/one-time-pad The perfect cipher Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptogr
From playlist Journey into cryptography | Computer Science | Khan Academy
Broadcasted live on Twitch -- Watch live at https://www.twitch.tv/leioslabs
From playlist Algorithm-archive
Mathematical Ideas in Lattice Based Cryptography - Jill Pipher
2018 Program for Women and Mathematics Topic: Mathematical Ideas in Lattice Based Cryptography Speaker: Jill Pipher Affiliation: Brown University Date: May 21, 2018 For more videos, please visit http://video.ias.edu
From playlist Mathematics
What We've Learned from NKS Chapter 10: Processes of Perception and Analysis
In this episode of "What We've Learned from NKS", Stephen Wolfram is counting down to the 20th anniversary of A New Kind of Science with [another] chapter retrospective. If you'd like to contribute to the discussion in future episodes, you can participate through this YouTube channel or th
From playlist Science and Research Livestreams
Random primality test (warm up) | Journey into cryptography | Computer Science | Khan Academy
Introduction to random primality tests & how they will work (warm up). Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/random-algorithms-probability/v/fermat-s-little-theorem-visualization?utm_source=YT&utm_medium=Desc&utm_campaign=computerscienc
From playlist Journey into cryptography | Computer Science | Khan Academy
This video gives a general introduction to cryptography WITHOUT actually doing any math. Terms covered include cryptology vs cryptography vs cryptanalysis, symmetric vs public key systems, and "coding theory." NOTE: Yes, I said and wrote "cryptOanalysis" when it's actually "cryptanalysis
From playlist Cryptography and Coding Theory
CERIAS Security: John Oritz: Steganography 1/6
Clip 1/6 Speaker: John Oritz · SRA International Steganography is a discipline of computer science whose aim is to conceal the existence of information. Steganography synergizes various technologies including data compression, digital signal processing, information theory, data networks,
From playlist The CERIAS Security Seminars 2008
Greatest common divisor and least common multiple: building blocks
The intuition behind gcd and lcm, from the perspective of factorizations. For aspiring mathematicians already familiar with prime numbers as the building blocks of integers. Learn the intuition, the definitions, and gain some practice. This video is appropriate for high school, for an i
From playlist GCDs and Euclidean algorithm
The Mathematics of Cryptography
Click here to enroll in Coursera's "Cryptography I" course (no pre-req's required): https://click.linksynergy.com/deeplink?id=vFuLtrCrRW4&mid=40328&murl=https%3A%2F%2Fwww.coursera.org%2Flearn%2Fcrypto%3Futm_term%3Dmajorprep_cryptography_jan2019 STEMerch Store: https://stemerch.com/ Suppor
From playlist Applied Math