Looking for the Loch Ness Monster by Stuart Clyburn
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Grade 6 Reading Student At–Home Activity Packet
Printer Warning: This packet is lengthy. Determine whether you want to print both sections, or only print Section 1 or 2. Grade 6 Reading Student At–Home Activity Packet This At–Home Activity packet includes two parts, Section 1 and Section 2, each with approximately 10 lessons in it. We recommend that your student complete one lesson each day. Most lessons can be completed independently. However, there are some lessons that would benefit from the support of an adult. If there is not an adult available to help, don’t worry! Just skip those lessons. Encourage your student to just do the best they can with this content—the most important thing is that they continue to work on their reading! Flip to see the Grade 6 Reading activities included in this packet! © 2020 Curriculum Associates, LLC. All rights reserved. Section 1 Table of Contents Grade 6 Reading Activities in Section 1 Lesson Resource Instructions Answer Key Page 1 Grade 6 Ready • Read the Guided Practice: Answers will vary. 10–11 Language Handbook, Introduction. Sample answers: Lesson 9 • Complete the 1. Wouldn’t it be fun to learn about Varying Sentence Guided Practice. insect colonies? Patterns • Complete the 2. When I looked at the museum map, Independent I noticed a new insect exhibit. Lesson 9 Varying Sentence Patterns Introduction Good writers use a variety of sentence types. They mix short and long sentences, and they find different ways to start sentences. Here are ways to improve your writing: Practice. Use different sentence types: statements, questions, imperatives, and exclamations. Use different sentence structures: simple, compound, complex, and compound-complex. -
Urban Myths Mythical Cryptids
Ziptales Advanced Library Worksheet 2 Urban Myths Mythical Cryptids ‘What is a myth? It is a story that pretends to be real, but is in fact unbelievable. Like many urban myths it has been passed around (usually by word of mouth), acquiring variations and embellishments as it goes. It is a close cousin of the tall tale. There are mythical stories about almost any aspect of life’. What do we get when urban myths meet the animal kingdom? We find a branch of pseudoscience called cryptozoology. Cryptozoology refers to the study of and search for creatures whose existence has not been proven. These creatures (or crytpids as they are known) appear in myths and legends or alleged sightings. Some examples include: sea serpents, phantom cats, unicorns, bunyips, giant anacondas, yowies and thunderbirds. Some have even been given actual names you may have heard of – do Yeti, Owlman, Mothman, Cyclops, Bigfoot and the Loch Ness Monster sound familiar? Task 1: Choose one of the cryptids from the list above (or perhaps one that you may already know of) and write an informative text identifying the following aspects of this mythical creature: ◊ Description ◊ Features ◊ Location ◊ First Sighting ◊ Subsequent Sightings ◊ Interesting Facts (e.g. how is it used in popular culture? Has it been featured in written or visual texts?) Task 2: Cryptozoologists claim there have been cases where species now accepted by the scientific community were initially considered urban myths. Can you locate any examples of creatures whose existence has now been proven but formerly thought to be cryptids? Extension Activities: • Cryptozoology is called a ‘pseudoscience’ because it relies solely on anecdotes and reported sightings rather than actual evidence. -
Related-Key Cryptanalysis of 3-WAY, Biham-DES,CAST, DES-X, Newdes, RC2, and TEA
Related-Key Cryptanalysis of 3-WAY, Biham-DES,CAST, DES-X, NewDES, RC2, and TEA John Kelsey Bruce Schneier David Wagner Counterpane Systems U.C. Berkeley kelsey,schneier @counterpane.com [email protected] f g Abstract. We present new related-key attacks on the block ciphers 3- WAY, Biham-DES, CAST, DES-X, NewDES, RC2, and TEA. Differen- tial related-key attacks allow both keys and plaintexts to be chosen with specific differences [KSW96]. Our attacks build on the original work, showing how to adapt the general attack to deal with the difficulties of the individual algorithms. We also give specific design principles to protect against these attacks. 1 Introduction Related-key cryptanalysis assumes that the attacker learns the encryption of certain plaintexts not only under the original (unknown) key K, but also under some derived keys K0 = f(K). In a chosen-related-key attack, the attacker specifies how the key is to be changed; known-related-key attacks are those where the key difference is known, but cannot be chosen by the attacker. We emphasize that the attacker knows or chooses the relationship between keys, not the actual key values. These techniques have been developed in [Knu93b, Bih94, KSW96]. Related-key cryptanalysis is a practical attack on key-exchange protocols that do not guarantee key-integrity|an attacker may be able to flip bits in the key without knowing the key|and key-update protocols that update keys using a known function: e.g., K, K + 1, K + 2, etc. Related-key attacks were also used against rotor machines: operators sometimes set rotors incorrectly. -
Cryptanalysis of a Reduced Version of the Block Cipher E2
Cryptanalysis of a Reduced Version of the Block Cipher E2 Mitsuru Matsui and Toshio Tokita Information Technology R&D Center Mitsubishi Electric Corporation 5-1-1, Ofuna, Kamakura, Kanagawa, 247, Japan [email protected], [email protected] Abstract. This paper deals with truncated differential cryptanalysis of the 128-bit block cipher E2, which is an AES candidate designed and submitted by NTT. Our analysis is based on byte characteristics, where a difference of two bytes is simply encoded into one bit information “0” (the same) or “1” (not the same). Since E2 is a strongly byte-oriented algorithm, this bytewise treatment of characteristics greatly simplifies a description of its probabilistic behavior and noticeably enables us an analysis independent of the structure of its (unique) lookup table. As a result, we show a non-trivial seven round byte characteristic, which leads to a possible attack of E2 reduced to eight rounds without IT and FT by a chosen plaintext scenario. We also show that by a minor modification of the byte order of output of the round function — which does not reduce the complexity of the algorithm nor violates its design criteria at all —, a non-trivial nine round byte characteristic can be established, which results in a possible attack of the modified E2 reduced to ten rounds without IT and FT, and reduced to nine rounds with IT and FT. Our analysis does not have a serious impact on the full E2, since it has twelve rounds with IT and FT; however, our results show that the security level of the modified version against differential cryptanalysis is lower than the designers’ estimation. -
Searching for Security in the Mystical the Function of Paranormal Beliefs
Searching for Security in the Mystical The Function of Paranormal Beliefs MARTIN R. GRIMMER ver the past two decades, the paranor- mal has enjoyed something of a revival Owithin popular culture. There have been countless books, magazine and newspaper articles, movies, and television programs devoted to topics ranging from UFOs, the Bermuda Triangle, lost continents, Yetis, and Belief in the the Loch Ness monster, to pyramid power, astrology, levitation, telepathy, precognition, paranormal and poltergeists. Sociologist Marcello Truzzi appears to satisfy (1972) suggested that this boom in paranormal interest began around the late sixties, noting some very basic, if that Ouija boards outsold such popular board inconsistent games as Monopoly. human needs. It Lately, the paranormal seems to have mani- fested in the form of the New Age movement— will probably a loose combination of ideas encompassing spir- remain with us itualism, mysticism, alternative healing, and a healthy dose of commercialism. Some may think forever. this is mainly an American phenomenon, but it is estimated that Australians alone now spend $100 million a year on personal-transformation courses that delve deeply into such fringe areas as rebirthing, shamanism, channeling, and crystal healing. To some observers, the New Age movement is seen as a sort of quasi-religious justification for "yuppiedom"—how to make money and feel "really great" about it at the same time. Winter 1992 Research studies worldwide have written on this topic, several themes revealed an extensive belief in and in the human motive to believe can acceptance of the paranormal. In a be identified. survey of the readers of Britain's New First, paranormal beliefs may oper- Scientist magazine, a high proportion ate to reassure the believer that there of whom are reported to hold post- is order and control in what may graduate degrees, Evans (1973) found otherwise appear to be a chaotic that 67 percent believed that ESP was universe (Frank 1977). -
A Proposed SAFER Plus Security Algorithm Using Fast Walsh Hadamard Transform for Bluetooth Technology D.Sharmila 1, R.Neelaveni 2
International Journal of Wireless & Mobile Networks (IJWMN), Vol 1, No 2, November 2009 A Proposed SAFER Plus Security algorithm using Fast Walsh Hadamard transform for Bluetooth Technology D.Sharmila 1, R.Neelaveni 2 1(Research Scholar), Associate Professor, Bannari Amman Institute of Technology, Sathyamangalam. Tamil Nadu-638401. [email protected] 2 Asst.Prof. PSG College of Technology, Coimbatore.Tamil Nadu -638401. [email protected] ABSTRACT realtime two-way voice transfer providing data rates up to 3 Mb/s. It operates at 2.4 GHz frequency in the free ISM-band (Industrial, Scientific, and Medical) using frequency hopping In this paper, a modified SAFER plus algorithm is [18]. Bluetooth can be used to connect almost any kind of presented. Additionally, a comparison with various device to another device. Typical range of Bluetooth communication varies from 10 to 100 meters indoors. security algorithms like pipelined AES, Triple DES, Bluetooth technology and associated devices are susceptible Elliptic curve Diffie Hellman and the existing SAFER plus to general wireless networking threats, such as denial of service attacks, eavesdropping, man-in-the-middle attacks, are done. Performance of the algorithms is evaluated message modification, and resource misappropriation. They based on the data throughput, frequency and security are also threatened by more specific Bluetooth-related attacks that target known vulnerabilities in Bluetooth level. The results show that the modified SAFER plus implementations and specifications. Attacks against algorithm has enhanced security compared to the existing improperly secured Bluetooth implementations can provide attackers with unauthorized access to sensitive information algorithms. and unauthorized usage of Bluetooth devices and other Key words : Secure And Fast Encryption Routine, Triple Data systems or networks to which the devices are connected. -
Partly-Pseudo-Linear Cryptanalysis of Reduced-Round SPECK
cryptography Article Partly-Pseudo-Linear Cryptanalysis of Reduced-Round SPECK Sarah A. Alzakari * and Poorvi L. Vora Department of Computer Science, The George Washington University, 800 22nd St. NW, Washington, DC 20052, USA; [email protected] * Correspondence: [email protected] Abstract: We apply McKay’s pseudo-linear approximation of addition modular 2n to lightweight ARX block ciphers with large words, specifically the SPECK family. We demonstrate that a pseudo- linear approximation can be combined with a linear approximation using the meet-in-the-middle attack technique to recover several key bits. Thus we illustrate improvements to SPECK linear distinguishers based solely on Cho–Pieprzyk approximations by combining them with pseudo-linear approximations, and propose key recovery attacks. Keywords: SPECK; pseudo-linear cryptanalysis; linear cryptanalysis; partly-pseudo-linear attack 1. Introduction ARX block ciphers—which rely on Addition-Rotation-XOR operations performed a number of times—provide a common approach to lightweight cipher design. In June 2013, a group of inventors from the US’s National Security Agency (NSA) proposed two families of lightweight block ciphers, SIMON and SPECK—each of which comes in a variety of widths and key sizes. The SPECK cipher, as an ARX cipher, provides efficient software implementations, while SIMON provides efficient hardware implementations. Moreover, both families perform well in both hardware and software and offer the flexibility across Citation: Alzakari, S.; Vora, P. different platforms that will be required by future applications [1,2]. In this paper, we focus Partly-Pseudo-Linear Cryptanalysis on the SPECK family as an example lightweight ARX block cipher to illustrate our attack. -
Safer Than You Think! Revising the Transit Safety Narrative 1 September 2021
www.vtpi.org [email protected] 250-508-5150 Safer Than You Think! Revising the Transit Safety Narrative 1 September 2021 Todd Litman Victoria Transport Policy Institute Abstract Public transportation is overall a relatively safe (low crash risk) and secure (low crime risk) mode of transport. Transit travel has about a tenth the traffic casualty (death or injury) rate as automobile travel, and transit-oriented neighborhood residents have about a fifth the per capita crash casualty rate as in automobile-oriented areas. Transit also tends to have lower overall crime rates than automobile travel, and many transit service improvements can further increase security by improving surveillance and economic opportunities for at-risk populations. Despite its relative safety and security, many people consider public transit dangerous, and so are reluctant to use it or support service expansions in their communities. Various factors contribute to this excessive fear, including the nature of public transit travel, heavy media coverage of transit- related crashes and crimes, and conventional traffic safety messages which emphasize danger rather than safety. Transit agencies can help create a new safety narrative by better measuring and communicating transit’s overall safety and security impacts, and providing better guidance concerning how users and communities can enhance transit safety and security. A summary version of this report was published as, “A New Transit Safety Narrative” Journal of Public Transportation, Vol. 17, No. 4, 2014, pp.121-142; at www.nctr.usf.edu/wp-content/uploads/2014/12/JPT17.4_Litman.pdf. It was also published as, The Hidden Traffic Safety Solution: Public Transportation, American Public Transportation Association (www.apta.com); at www.apta.com/mediacenter/pressreleases/2016/Pages/Hidden-Traffic-Safety-Solution.aspx Todd Litman 2013-2021 You are welcome and encouraged to copy, distribute, share and excerpt this document and its ideas, provided the author is given attribution. -
Miss in the Middle Attacks on IDEA and Khufu
Miss in the Middle Attacks on IDEA and Khufu Eli Biham? Alex Biryukov?? Adi Shamir??? Abstract. In a recent paper we developed a new cryptanalytic techni- que based on impossible differentials, and used it to attack the Skipjack encryption algorithm reduced from 32 to 31 rounds. In this paper we describe the application of this technique to the block ciphers IDEA and Khufu. In both cases the new attacks cover more rounds than the best currently known attacks. This demonstrates the power of the new cryptanalytic technique, shows that it is applicable to a larger class of cryptosystems, and develops new technical tools for applying it in new situations. 1 Introduction In [5,17] a new cryptanalytic technique based on impossible differentials was proposed, and its application to Skipjack [28] and DEAL [17] was described. In this paper we apply this technique to the IDEA and Khufu cryptosystems. Our new attacks are much more efficient and cover more rounds than the best previously known attacks on these ciphers. The main idea behind these new attacks is a bit counter-intuitive. Unlike tra- ditional differential and linear cryptanalysis which predict and detect statistical events of highest possible probability, our new approach is to search for events that never happen. Such impossible events are then used to distinguish the ci- pher from a random permutation, or to perform key elimination (a candidate key is obviously wrong if it leads to an impossible event). The fact that impossible events can be useful in cryptanalysis is an old idea (for example, some of the attacks on Enigma were based on the observation that letters can not be encrypted to themselves). -
Carnot Travelogue - Scotland 2015
Avant-propos Au pays des Lochs et des légendes Ce voyage s'est déroulé du 7 au 14 mai 2015. Nous avons passé une semaine délicieuse en compagnie des élèves de la classe de 1S1 euro SVT, 3 élèves de 2nde 8 euro SVT et 1 élève de 1E1. Des Lowlands aux Highlands, d'Édimbourg à Stirling, Saint Andrews, Inverness... Châteaux et Cathédrales, héros et légendes, paysages spectaculaires entre lochs et collines... sans oublier la rencontre avec Nessie, monstre sympathique du Loch Ness... Chaque élève a rédigé un carnet de voyage (Travelogue) de plus d'une dizaine de pages (one page a day. Or more!) émaillé d'anecdotes, de photos et d'émotions... Nous espérons que nos élèves garderont ces images en mémoire, tout comme nous... Voici ci-après un compte-rendu de chaque jour de la semaine, extraits de plusieurs « travelogues ». Enjoy ! Nous tenons à remercier tous les élèves pour leur investissement, leur fraîcheur, leur sens de l'humour, leur enthousiasme, leurs sourires, et surtout... leur ponctualité tout au long de la semaine. Merci aussi à leurs parents pour avoir rendu possible leur découverte de ce pays « de Lochs et de légendes ». Et un grand merci aussi à José Torrecilla pour sa précieuse collaboration pendant ces huit jours... ! My heart's in the Highlands. The birth-place of Valour, the country of Worth; Wherever I wander, wherever I rove, The hills of the Highlands for ever I love. ROBERT BURNS 1759-1796 Muriel Garnier et Valérie Rapin Professeurs d’anglais au Lycée Carnot Travel through Scotland 3 Day 1 Departure Thursday May 7th 2015 was such a great day… We began our trip to Scotland early in the morning, at 3:50 AM. -
Applications of Search Techniques to Cryptanalysis and the Construction of Cipher Components. James David Mclaughlin Submitted F
Applications of search techniques to cryptanalysis and the construction of cipher components. James David McLaughlin Submitted for the degree of Doctor of Philosophy (PhD) University of York Department of Computer Science September 2012 2 Abstract In this dissertation, we investigate the ways in which search techniques, and in particular metaheuristic search techniques, can be used in cryptology. We address the design of simple cryptographic components (Boolean functions), before moving on to more complex entities (S-boxes). The emphasis then shifts from the construction of cryptographic arte- facts to the related area of cryptanalysis, in which we first derive non-linear approximations to S-boxes more powerful than the existing linear approximations, and then exploit these in cryptanalytic attacks against the ciphers DES and Serpent. Contents 1 Introduction. 11 1.1 The Structure of this Thesis . 12 2 A brief history of cryptography and cryptanalysis. 14 3 Literature review 20 3.1 Information on various types of block cipher, and a brief description of the Data Encryption Standard. 20 3.1.1 Feistel ciphers . 21 3.1.2 Other types of block cipher . 23 3.1.3 Confusion and diffusion . 24 3.2 Linear cryptanalysis. 26 3.2.1 The attack. 27 3.3 Differential cryptanalysis. 35 3.3.1 The attack. 39 3.3.2 Variants of the differential cryptanalytic attack . 44 3.4 Stream ciphers based on linear feedback shift registers . 48 3.5 A brief introduction to metaheuristics . 52 3.5.1 Hill-climbing . 55 3.5.2 Simulated annealing . 57 3.5.3 Memetic algorithms . 58 3.5.4 Ant algorithms . -
The Summation-Truncation Hybrid: Reusing Discarded Bits for Free
The Summation-Truncation Hybrid: Reusing Discarded Bits for Free Aldo Gunsing and Bart Mennink Digital Security Group, Radboud University, Nijmegen, The Netherlands [email protected], [email protected] Abstract. A well-established PRP-to-PRF conversion design is trun- cation: one evaluates an n-bit pseudorandom permutation on a certain input, and truncates the result to a bits. The construction is known to achieve tight 2n−a=2 security. Truncation has gained popularity due to its appearance in the GCM-SIV key derivation function (ACM CCS 2015). This key derivation function makes four evaluations of AES, truncates the outputs to n=2 bits, and concatenates these to get a 2n-bit subkey. In this work, we demonstrate that truncation is wasteful. In more detail, we present the Summation-Truncation Hybrid (STH). At a high level, the construction consists of two parallel evaluations of truncation, where the truncated (n − a)-bit chunks are not discarded but rather summed together and appended to the output. We prove that STH achieves a similar security level as truncation, and thus that the n − a bits of extra output is rendered for free. In the application of GCM-SIV, the current key derivation can be used to output 3n bits of random material, or it can be reduced to three primitive evaluations. Both changes come with no security loss. Keywords: PRP-to-PRF, Truncation, Sum of permutations, Efficiency, GCM-SIV 1 Introduction The vast majority of symmetric cryptographic schemes is built upon a pseu- dorandom permutation, such as AES [21]. Such a function gets as input a key and bijectively transforms its input to an output such that the function is hard to distinguish from random if an attacker has no knowledge about the key.