National Security Agency encryption devices
NESTOR was a family of compatible, tactical, wideband secure voice systems developed by the U.S. National Security Agency and widely deployed during the Vietnam War through the late Cold War period of the 1980s. NESTOR consists of three systems. The KY-8 was used in vehicular and afloat applications; the KY-28 was the airborne version; and the KY-38 was the portable or man-pack model. About 30,000 NESTOR equipments were produced prior to their replacement by the VINSON secure voice family. Keying was accomplished by setting each switch in a matrix of switches to one of several positions. This was done using a separate mechanical key loader (KYK-28) that had a matching matrix of pins that could be set to different heights as instructed by a key list. The key loader was pushed into a matrix of holes, one hole for each switch. The loader also had two larger index pins that also cocked a spring that would return each switch to its initial position when the door covering the hole matrix was reopened, zeroizing the equipment. (Wikipedia).
Symmetric Key Cryptography: The Caesar Cipher
This is the first in a series about cryptography; an extremely important aspect of computer science and cyber security. It introduces symmetric key cryptography with a well known substitution cipher, namely the Caesar Cipher. It includes a few examples you can try for yourself using diff
From playlist Cryptography
Symmetric Key Cryptography: The Keyword Cipher
This is the second in a series about cryptography; an extremely important aspect of computer science and cyber security. It covers a substitution cipher called the keyword cipher, also known as the Vigenère cipher. It explains how a keyword, or key phrase, can be used to effectively gene
From playlist Cryptography
Cryptanalysis of Classical Ciphers
Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist Computer - Cryptography and Network Security
Network Security: Classical Encryption Techniques
Fundamental concepts of encryption techniques are discussed. Symmetric Cipher Model Substitution Techniques Transposition Techniques Product Ciphers Steganography
From playlist Network Security
From playlist Week 2 2015 Shorts
Symmetric Key Cryptography: The XOR Cipher
This is the fourth in a series about cryptography; an extremely important aspect of computer science and cyber security. It covers the XOR logical operation, that is the exclusive OR operation, explaining how it can be used to encrypt and decrypt a sequence of binary digits. XOR is an im
From playlist Cryptography
An informal introduction to cryptography. Part of a larger series teaching programming at http://codeschool.org
From playlist Cryptography
Thunderbird Live Development Session #2
Join me during one of my usual mornings spent coding Thunderbird. Help me fix bugs, take a look under the hood, yell at me for not being smart, and learn how you can also contribute to Thunderbird. https://www.thunderbird.net https://developer.thunderbird.net
From playlist Thunderbird Live Coding
Workshop 1 "Operator Algebras and Quantum Information Theory" - CEB T3 2017 - R. Duan
Runyao Duan (Centre for Quantum Software and Information, University of Technology Sydney (UTS), Australia) / 12.09.17 Title: Asymptotic entanglement manipulation under PPT operations: new SDP bounds and irreversibility Abstract: We study various aspects of asymptotic entanglement manipu
From playlist 2017 - T3 - Analysis in Quantum Information Theory - CEB Trimester
Math 060 Fall 2017 103017C Orthogonal Complements
Orthogonal subspaces; examples; nonexample. Orthogonal complements. Trivial observations about orthogonal subspaces and orthogonal complements. Fundamental Subspaces Theorem. More facts about orthogonal complements: the dimension of an orthogonal complement is complementary to the dime
From playlist Course 4: Linear Algebra (Fall 2017)
Breathe Deep | After Dark Online
It happens around 15 times a minute, regularly and rhythmically. You may not even notice it—but if it stopped, you definitely would. Tonight, we turn our attention to human breath. Find out how human breathing has changed over an extended period of time, through both physical and external
From playlist After Dark Online | Thursday Nights | Exploratorium
Is ACTION The Most Fundamental Property in Physics?
Learn More About NordVPN at: https://nordvpn.com/spacetime It’s about time we discussed an obscure concept in physics that may be more fundamental than energy and entropy and perhaps time itself. That’s right - the time has come for Action. Sign Up on Patreon to get access to the Space
From playlist The Standard Model Lagrangian Playlist
Where did Russia come from? - Alex Gendler
Trace the evolution of Russia, from Kievan Rus to present day, and find out how it became the biggest country in the world. -- Russia is the biggest country in the world, spanning one-eighth of the Earth’s landmass. But where did it all begin? Alex Gendler explores the epic history of th
From playlist New TED-Ed Originals
22C3: Attacking the IPv6 Protocol Suite
Speaker: van Hauser After a short introduction on the differences of IPv4 to IPv6, the weaknesses in IPv6 will be shown. Highlight of the talk is the presentation of the THC-IPV6 Attack Toolkit, which includes all IPv6 attacks as well as a low level packet library for easy crafting packet
From playlist 22C3: Private Investigations
Harvard ENGL E-129 - Lecture 2: Troilus and Cressida
Recorded on Sep 26, 2007.
From playlist Harvard: Shakespeare After All: The Later Plays - CosmoLearning.com English Course
Few other Cryptanalytic Techniques
Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist Computer - Cryptography and Network Security
Java Exception Handling | Java Programming Tutorial | Java Training | Edureka | Java Rewind - 2
🔥Java Certification Training: https://www.edureka.co/java-j2ee-training-course This Edureka tutorial on “Java Exception Handling” will give you a brief insight into Exceptions in Java and its various methods to handle the Exceptions along with examples. 🔴Subscribe to our channel to get
From playlist Edureka Live Classes 2020