National Security Agency encryption devices

NESTOR (encryption)

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).

NESTOR (encryption)
Video thumbnail

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

Video thumbnail

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

Video thumbnail

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

Video thumbnail

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

Video thumbnail

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

Video thumbnail

Cryptography (part 1 of 3)

An informal introduction to cryptography. Part of a larger series teaching programming at http://codeschool.org

From playlist Cryptography

Video thumbnail

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

Video thumbnail

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

Video thumbnail

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)

Video thumbnail

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

Video thumbnail

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

Video thumbnail

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

Video thumbnail

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

Video thumbnail

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

Video thumbnail

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

Related pages

VINSON | Cryptoperiod | NSA encryption systems | Secure voice | Zeroisation