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  • 1
    Online Resource
    Online Resource
    Singapore :Springer Singapore Pte. Limited,
    Keywords: Computer security. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (305 pages)
    Edition: 1st ed.
    ISBN: 9789811587115
    Series Statement: Algorithms for Intelligent Systems Series
    DDC: 005.8
    Language: English
    Note: Intro -- Preface -- Contents -- About the Editors -- Part ISecurity Using Cryptography and Chaotic Theory: Algorithm Development and Analysis -- 1 Securing Medical Images via a Texture and Chaotic Key Framework -- 1 Introduction -- 2 Related Work -- 3 Materials and Methods -- 3.1 Initial Pixel Shuffling via ACM -- 3.2 Low-/Mid-Frequency Maps via Gabor Filters -- 3.3 Key Generation via Chaotic Maps -- 4 Results and Analysis -- 4.1 Histogram Analysis -- 4.2 Image Entropy -- 4.3 Line Profile -- 4.4 Correlation Coefficient -- 4.5 Key Space of the Proposed Cryptosystem -- 4.6 Image Quality Performance -- 5 Conclusion -- References -- 2 Image Encryption Based on DNA Substitution and Chaotic Theory -- 1 Introduction -- 2 Introduction to DNA -- 2.1 DNA Encoding and Complementary Rule -- 2.2 DNA-Based Image Encryption -- 3 Chaos and Logistic Map -- 4 Literature Review -- 5 Proposed Method -- 5.1 Formation of Chaotic Binary Sequence -- 5.2 DNA Substitution -- 6 Algorithm Description of the Proposed Technique -- 7 Simulation Results -- 7.1 Security Analysis -- 7.2 Secret Key's Sensitivity Analysis -- 7.3 Secret Key's Space Analysis -- 7.4 Histogram Analysis -- 8 Conclusion -- References -- 3 Impact of Computational Power on Cryptography -- 1 Introduction -- 1.1 Literature Review -- 1.2 Organization of Chapter -- 2 Introduction to Cryptography -- 3 Pre-multimedia Era cryptography-The Classical Cryptography -- 3.1 Caesar Cipher -- 3.2 Shift Ciphers -- 3.3 Impact of Computational Power on Caesar and Shift Ciphers -- 3.4 Monoalphabetic Substitution Ciphers (MASC) -- 3.5 Vigenère Cipher -- 3.6 Impact of Computational Power on Vigenère Cipher -- 3.7 The One-Time Pad or Vernam Cipher -- 3.8 Impact of Computational Power on One-Time Pad -- 3.9 Transposition or Permutation Ciphers -- 3.10 Impact of Computational Power on Transposition Ciphers. , 4 Modern Cryptography -- 4.1 Data Encryption Standard (DES) -- 4.2 Impact of Computational Power on DES -- 4.3 Tripe DES (3DES or FIPS 46-3) -- 4.4 Impact of Computational Power on 3DES -- 4.5 AES-Advanced Encryption Standard -- 4.6 Impact of Computational Power on AES -- 4.7 RSA Public Key Cipher -- 4.8 Impact of Computational Power on RSA -- 4.9 Elliptic Curve Cryptography (ECC) -- 4.10 Impact of Computational Power on Elliptic Curve Cryptography (ECC) -- 5 Conclusion -- References -- 4 Privacy Preserving Anti-forensic Techniques -- 1 Introduction -- 2 Related Work -- 2.1 Privacy -- 2.2 Anti-forensics -- 3 Privacy Preserving Anti-forensic Techniques -- 3.1 Data Wiping: Secured Deletion -- 3.2 Boot Sector -- 3.3 Reserved Locations -- 3.4 Slack Space -- 3.5 HPA and DCO -- 3.6 Directory Mounting: Hiding in Plain Sight -- 3.7 Encryption: Second Most Anti-forensic Technique -- 3.8 Steganography: A Perfect Camouflage -- 3.9 Onion Routing: Anonymous Communication -- 4 Discussion -- 5 Conclusion -- References -- Part IIInformation Embedding for Secure Data Communication and Authentication -- 5 Information Embedding Using DNA Sequences for Covert Communication -- 1 Introduction -- 2 Introduction to DNA -- 2.1 DNA Computing -- 2.2 DNA Cryptography -- 3 Literature Review -- 4 Proposed Method -- 4.1 Method 1: New Substitution Method for Data Hiding Using DNA Sequences -- 4.2 Method 2: New Insertion Method for Data Encryption Using DNA Sequences -- 5 Results and Discussion -- 6 Conclusion and Future Work -- References -- 6 Information Hiding in Color Images Utilizing Multi-bit Substitution Patterns -- 1 Introduction -- 2 Related Work -- 3 Proposed Scheme -- 3.1 Interpolation -- 3.2 Multi-bit Substitution Pattern -- 3.3 Data Embedding -- 3.4 Data Extraction -- 4 Results and Discussions -- 4.1 Imperceptibility Analysis -- 4.2 Reversibility analysis. , 4.3 Authentication and Fragility analysis -- 5 Summary -- References -- 7 Data Embedding in Color Images: A Secure Data Communication Framework Based on Modular Arithmetic -- 1 Introduction -- 2 Literature Survey -- 3 Proposed Scheme -- 4 Experimental Results -- 5 Conclusion -- References -- 8 Survey on Reversible Watermarking Techniques for Medical Images -- 1 Introduction -- 2 General Framework for Digital Watermarking -- 2.1 Watermark Embedding Module (WEM) -- 2.2 Watermark Detection/Extraction Module (WDM) -- 3 Classification of Digital Watermarking -- 3.1 Fragile Watermarking -- 3.2 Semi-fragile Watermarking -- 3.3 Robust Watermarking -- 4 Classification of Reversible Digital Watermarking -- 5 Evaluation Metrics -- 5.1 Peak Signal-To-Noise Ratio (PSNR) -- 5.2 Structural Similarity (SSIM) Index -- 6 State-of-the-Art Reversible Watermarking for Medical Imagery -- 7 Conclusion -- References -- 9 Security and Privacy of E-health Data -- 1 Introduction -- 2 Background -- 2.1 Applications of Electronic Health Records (EHR) -- 2.2 Privacy in Electronic Health Systems -- 3 Security in Electronic Health Systems -- 4 Security Models Proposed in E-healthcare -- 5 Conclusion -- References -- Part IIISecurity in IoT and Big Data-Driven Enterprise -- 10 Implementation of Intrusion Detection System for Internet of Things Using Machine Learning Techniques -- 1 Introduction -- 2 Related Work -- 3 Methodology -- 4 Result and Analysis -- 5 Conclusion and Future Scope -- References -- 11 An Efficient Approach for Phishing Detection using Machine Learning -- 1 Introduction -- 2 Related Work -- 3 Methodology Used -- 3.1 Data Acquisition -- 3.2 Classification before Feature Selection -- 3.3 Feature Selection -- 3.4 Classification after Feature Selection -- 3.5 Evaluation and Validation -- 4 Experimental Results -- 5 Conclusion and Future Scope -- References. , 12 Use of Blockchain and Internet of Things for Securing Data in Healthcare Systems -- 1 Introduction -- 1.1 Blockchain Concept -- 1.2 Internet of Things -- 2 History of Blockchain -- 3 Working of Blockchain -- 4 Literature Survey -- 5 Proposed Methodology -- 6 Scope of Improvement in Model -- 7 Conclusion -- References -- 13 Asset Security in Data of Internet of Things Using Blockchain Technology -- 1 Introduction -- 1.1 Blockchain Concept -- 1.2 Internet of Things -- 1.3 Blockchain in Internet of Things -- 1.4 Key Blockchain Features for Building Trust in Organizations -- 2 Related Work -- 3 Asset Management in IoT Using Blockchain -- 4 Future Trends of Blockchain in IoT -- 5 Conclusion -- References -- 14 Review of Secure Distributed Range-Free Hop-Based Localization Algorithms in the Wireless Sensor Networks -- 1 Introduction -- 2 Localization Process -- 3 Localization Types -- 3.1 GPS Related -- 3.2 Communication-Based -- 3.3 Anchor Related -- 3.4 Range Related -- 3.5 Range-Free Schemes -- 4 Issues in Localization -- 4.1 Accuracy -- 4.2 Energy Consumption -- 4.3 Overhead -- 4.4 Optimization -- 4.5 Mobility -- 4.6 3D Deployment -- 4.7 Security -- 5 Need of Secure Localization -- 5.1 Security Requirements -- 5.2 Various Attacks in Localization -- 6 Secure Localization-Based Related Work -- 7 Multimedia Security and Authentication Techniques-Related Work -- 8 Research Gaps -- 9 Conclusion -- References.
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  • 2
    Keywords: Forschungsbericht ; Kernreaktorsicherheit ; Aderisolation ; PEP ; Isolierhülle ; Polyethylene ; Alterung ; Zerstörungsfreie Werkstoffprüfung
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (127 Seiten, 7,10 MB) , Illustrationen, Diagramme
    Language: German , English
    Note: Förderkennzeichen BMWi 1501567A+B , Verbundnummer 01183601 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Sprache der Kurzfassungen: Deutsch, Englisch
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  • 3
    Publication Date: 2023-02-03
    Description: Since the beginning of the Anthropocene, lacustrine biodiversity has been influenced by climate change and human activities. These factors advance the spread of harmful cyanobacteria in lakes around the world, which affects water quality and impairs the aquatic food chain. In this study, we assessed changes in cyanobacterial community dynamics via sedimentary DNA (sedaDNA) from well-dated lake sediments of Lake Tiefer See, which is part of the Klocksin Lake Chain spanning the last 350 years. Our diversity and community analysis revealed that cyanobacterial communities form clusters according to the presence or absence of varves. Based on distance-based redundancy and variation partitioning analyses (dbRDA and VPA) we identified that intensified lake circulation inferred from vegetation openness reconstructions, δ13C data (a proxy for varve preservation) and total nitrogen content were abiotic factors that significantly explained the variation in the reconstructed cyanobacterial community from Lake Tiefer See sediments. Operational taxonomic units (OTUs) assigned to Microcystis sp. and Aphanizomenon sp. were identified as potential eutrophication-driven taxa of growing importance since circa common era (ca. CE) 1920 till present. This result is corroborated by a cyanobacteria lipid biomarker analysis. Furthermore, we suggest that stronger lake circulation as indicated by non-varved sediments favoured the deposition of the non-photosynthetic cyanobacteria sister clade Sericytochromatia, whereas lake bottom anoxia as indicated by subrecent- and recent varves favoured the Melainabacteria in sediments. Our findings highlight the potential of high-resolution amplicon sequencing in investigating the dynamics of past cyanobacterial communities in lake sediments and show that lake circulation, anoxic conditions, and human-induced eutrophication are main factors explaining variations in the cyanobacteria community in Lake Tiefer See during the last 350 years.
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 4
    Publication Date: 2023-05-05
    Description: The marine-terrestrial Baltic ecosystem is sensitive to a range of environmental forcing and thresholds. Multi-archive investigations of its evolution require a precise synchronization of the considered archives. Here, we apply globally common cosmogenic radionuclide production rate variations to synchronize 10Be records from brackish Western Gotland Basin (Baltic Sea) and terrestrial lake Tiefer See (NE Germany) sediments to the atmospheric 14C time-scale and investigate phase-relationships in proxy responses in the southern Baltic realm associated with the onset of a centennial Mid-Holocene climate oscillation ∼5800 a BP. Based on paired molybdenum and titanium records, we identify a 98 ± 81-year delay in Western Gotland Basin ventilation, compared to the terrestrial response at the onset of the recorded Mid-Holocene climate oscillation. Most plausible mechanism for this delay is strengthened stratification in response to enhanced freshwater input during the first decades of the oscillation.
    Type: info:eu-repo/semantics/article
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  • 5
    Publication Date: 2023-01-25
    Description: Sedimentary DNA-based studies revealed the effects of human activity on lake cyanobacteria communities over the last centuries, yet we continue to lack information over longer timescales. Here, we apply high-resolution molecular analyses on sedimentary ancient DNA to reconstruct the history of cyanobacteria throughout the Holocene in a lake in north-eastern Germany. We find a substantial increase in cyanobacteria abundance coinciding with deforestation during the early Bronze Age around 4000 years ago, suggesting increased nutrient supply to the lake by local communities settling on the lakeshore. The next substantial human-driven increase in cyanobacteria abundance occurred only about a century ago due to intensified agricultural fertilisation which caused the dominance of potentially toxic taxa (e.g., Aphanizomenon). Our study provides evidence that humans began to locally impact lake ecology much earlier than previously assumed. Consequently, managing aquatic systems today requires awareness of the legacy of human influence dating back potentially several millennia.
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 6
    Publication Date: 2024-04-03
    Description: Significance Continental glaciers and ice sheets are excellent indicators of ongoing and past climate changes. The Patagonian ice sheet (PIS) was the largest extrapolar ice sheet in the Southern Hemisphere. Many studies have investigated the advances of the PIS on its eastern side, but there are only a few PIS records on the Pacific side. We show that three active intervals occurred during the last ~140 ka, with an extended PIS that contributed to the release of large amounts of freshwater and sediment into the Pacific. Active intervals during the last glacial period occurred from ~70 to 60 ka and from ~40 to 18 ka, with four and five phases of increased ice discharge, respectively, most likely driven by precipitation changes. Abstract Terrestrial glacial records from the Patagonian Andes and New Zealand Alps document quasi-synchronous Southern Hemisphere–wide glacier advances during the late Quaternary. However, these records are inherently incomplete. Here, we provide a continuous marine record of western–central Patagonian ice sheet (PIS) extent over a complete glacial–interglacial cycle back into the penultimate glacial (~140 ka). Sediment core MR16-09 PC03, located at 46°S and ~150 km offshore Chile, received high terrestrial sediment and meltwater input when the central PIS extended westward. We use biomarkers, foraminiferal oxygen isotopes, and major elemental data to reconstruct terrestrial sediment and freshwater input related to PIS variations. Our sediment record documents three intervals of general PIS marginal fluctuations, during Marine Isotope Stage (MIS) 6 (140 to 135 ka), MIS 4 (~70 to 60 ka), and late MIS 3 to MIS 2 (~40 to 18 ka). These higher terrigenous input intervals occurred during sea-level low stands, when the western PIS covered most of the Chilean fjords, which today retain glaciofluvial sediments. During these intervals, high-amplitude phases of enhanced sediment supply occur at millennial timescales, reflecting increased ice discharge most likely due to a growing PIS. We assign the late MIS 3 to MIS 2 phases and, by inference, older advances to Antarctic cold stages. We conclude that the increased sediment/meltwater release during Southern Hemisphere millennial-scale cold phases was likely related to higher precipitation caused by enhanced westerly winds at the northwestern margin of the PIS. Our records complement terrestrial archives and provide evidence for PIS climate sensitivity.
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 7
  • 8
    Publication Date: 2024-04-24
    Description: Multi-archive studies of climate events and archive-specific response times require synchronous time scales. Aligning common variations in the cosmogenic radionuclide production rate via curve fitting methods provides a tool for the continuous synchronization of natural environmental archives down to decadal precision. Based on this approach, we synchronize 10Be records from Western Gotland Basin (WGB, Baltic Sea) and Lake Kälksjön (KKJ, central Sweden) sediments to the 14C production time series from the IntCal20 calibration curve during the Mid-Holocene period ~6400 to 5200 a BP. Before the synchronization, we assess and reduce non-production variability in the 10Be records by using 10Be/9Be ratios and removing common variability with the TOC record from KKJ sediments based on regression analysis. The synchronizations to the IntCal20 14C production time scale suggest decadal to multi-decadal refinements of the WGB and KKJ chronologies. These refinements reduce the previously centennial chronological uncertainties of both archives to about ± 20 (WGB) and ±40 (KKJ) years. Combining proxy time series from the synchronized archives enables us to interpret a period of ventilation in the deep central Baltic Sea basins from ~6250 to 6000 a BP as possibly caused by inter-annual cooling reducing vertical water temperature gradients allowing deep water formation during exceptionally cold winters.
    Type: info:eu-repo/semantics/article
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