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Articlesymmetric-key encryptionsymmetric-key encryption is effective only if the symmetric key is kept secret by the two parties involved. If anyone else discovers the key, it affects both confidentiality and authentication. A person with an unauthorized symmetric key not only can decrypt messages sent with that key, but can encrypt new messages and send them as if they came from one of the two parties who were originally using the key.By: Vijaya Super adminWednesday, May 12, 2021AGRI-FOOD SYSTEMS+3
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Articlesymmetric-key encryptionsymmetric-key encryption is effective only if the symmetric key is kept secret by the two parties involved. If anyone else discovers the key, it affects both confidentiality and authentication. A person with an unauthorized symmetric key not only can decrypt messages sent with that key, but can encrypt new messages and send them as if they came from one of the two parties who were originally using the key.By: Vijaya Super adminWednesday, May 12, 2021AGRI-FOOD SYSTEMS+3
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OpportunityAgri and food ScholarSupporting Rationale and Research Bannan-Ritland, B. (2002). Computer-mediated communication, elearning, and interactivity: A review of the research. Quarterly Review of Distance Education, 3(2), 161-79. Dwyer, K. K., Bingham, S. G., Carlson, R. E., Prisbell, M., Cruz, A. M., & Fus, D. A. (2004). Communication and connectedness in the classroom: Development of the connected classroom climate inventory. Communication Research Reports, 21(3), 264-272.http://bit.ly/2s8jFEH Wiemann, J. M., & Backlund, P. (1980). Current theory and research in communicative competence. Review of how does it achieve its effects? American Educational Research Journal, 50(1), 185-199.http://journals.sagepub.com/doi/abs/10.3102/00346543050001185 Greene, J. A., Seung, B. Y., & Copeland, D. Z. (2014). Measuring critical components of digital literacy and their relationships with learning. Computers & Education, 76, 55-69.By: Rose HozwWednesday, May 12, 2021HEALTH AND NUTRITION+1
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ArticleCommunication to Support Student Learning in a Digital Learning EnvironmentThe P21 framework emphasizes effective use of oral, written, and nonverbal communication skills for multiple purposes (e.g., to inform, instruct, motivate, persuade, and share ideas). It also focuses on effective listening, using technology to communicate, and being able to evaluate the effectiveness of communication efforts—all within diverse contexts (adapted from P21). Note that working in partners is a great way to collaborate or build shared understanding but a critical part of communication is sharing with an authentic audience. Example strategies that use technology to support communication in the classroom: Host a TED-style conference or showcases for your students to present original ideas on a topic of interest to them to an authentic, external audience. Record and post the videos to a youtube stream. Provide opportunities to listen and ask questions through back channel tools like Today’s Meet or even Twitter. Have your students publish their work through blogs, by creating websites, and by building other online resources that are shared with authentic audiences.By: Rose HozwWednesday, May 12, 2021CULTURE AND SOCIETY+1
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ArticleEncryption and decryptionEncryption and decryption address the problem of eavesdropping, one of the three Internet security issues mentioned at the beginning of this document. But encryption and decryption, by themselves, do not address another problem: tampering. This section describes how public-key cryptography addresses the problem of tampering. Tamper detection and related authentication techniques rely on a mathematical function called a one-way hash (also called a message digest). A one-way hash is a number of fixed length with the following characteristics: The value of the hash is unique for the hashed data. Any change in the data, even deleting or altering a single character, results in a different value. The content of the hashed data cannot, for all practical purposes, be deduced from the hash-which is why it is called "one-way."By: rupaliWednesday, May 12, 2021WATER, ENERGY, AND THE ENVIRONMENT+1
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Articlesymmetric-key encryptionWith symmetric-key encryption, the encryption key can be calculated from the decryption key and vice versa. With most symmetric algorithms, the same key is used for both encryption and decryption.Implementations of symmetric-key encryption can be highly efficient so that users do not experience any significant time delay as a result of the encryption and decryption. Symmetric-key encryption also provides a degree of authentication, since information encrypted with one symmetric key cannot be decrypted with any other symmetric key. Thus, as long as the symmetric key is kept secret by the two parties using it to encrypt communications, each party can be sure that it is communicating with the other as long as the decrypted messages continue to make sense.By: Vijaya Super adminWednesday, May 12, 2021WATER, ENERGY, AND THE ENVIRONMENT+1
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ArticleEducationEducator Reflection What is communication (and what isn’t it)? The P21 framework emphasizes effective use of oral, written, and nonverbal communication skills for multiple purposes (e.g., to inform, instruct, motivate, persuade, and share ideas). It also focuses on effective listening, using technology to communicate, and being able to evaluate the effectiveness of communication efforts—all within diverse contexts (adapted from P21). Note that working in partners is a great way to collaborate or build shared understanding but a critical part of communication is sharing with an authentic audience.By: Abira GroozWednesday, May 12, 2021CULTURE AND SOCIETY+2
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