Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"plaintext"”.
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An Archeology of Cryptography: Rewriting Plaintext, Encryption, and Ciphertext
… rewrite the conventional terms of art, namely, plaintext, encryption, and ciphertext. I argue that plaintext has historically been understood as kind of inscription or form of writing, and has been associated with the development of artificial languages, and used to analyze and investigate the …
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New tools in cryptography : mutually independent commitments, tweakable block ciphers, and plaintext awareness via key registration
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.
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HiPIP: High -Performance Invocation Protection
… with 100 Mbps Ethernet. For a null RMI, the plaintext latency is 150 microseconds. Our HiPIP implementation adds 6 microseconds with a latency of 156 microseconds, whereas the DES encrypted null RMI is almost 200 times the plaintext latency: over 29 milliseconds. We develop an extrapolation …
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Compression and cryptology
… to automate the attacks are provided. Chosen plaintext attacks are given for Huffman coding, PPM, and splaying. Known plaintext attacks are given for arithmetic coding, splaying and Ziv-Lempel compressors. A ciphertext only attack is given for the Ziv-Lempel compressors. These results are used …
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From client-side encryption to secure web applications
… cannot gain access to the decryption keys or plaintext data, CryptFrame provides a browser extension that stores the keys and allows only sensitive regions in the web page to access them. CryptFrame performs templatized verification of sensitive regions to grant small amounts of trusted …
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A combined approach for hiding partial information in RSA
… that arises when information about either the plaintext or the key is leaked in subtle ways. Quite a common case is where there are a small number of possible messages that may be sent. An attacker may be able to crack the scheme simply by enumerating all the possible ciphertexts. Two methods …
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Optimizing fully homomorphic encryption
… removing the need to trust cloud providers with plaintext data. We present two new FHE scheme variants of BGV'12, both of which remove the need for key switching after a ciphertext multiplication, overall halving the runtime of bootstrapping. We also present multiple implementations of 32-bit …
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Information-theoretic metrics for security and privacy
… is at least as long as the secret message (i.e. plaintext) being communicated, which is infeasible in practice. Nevertheless, even with short keys, we show that a certain level of security can be guaranteed, albeit not perfect secrecy. In order to quantify exactly how much security can be …
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Sniffing, Decoding and Decryption of GSM Signals Using low cost hardware and Open-source software
… algorithm used in GSM. Given 114-bit of known plaintext, we are able to recover the session key with a hit rate of 19%. The tables are expected to be unique as they provide the best coverage yet known to the authors and research workers and they are the first step in a real-world passive attack …
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Neural Cryptanalysis for Cyber-Physical System Ciphers
… method, which trains neural networks on a set of plaintext/ciphertext pairs to extract meaningful bitwise relationships and predict corresponding ciphertexts given a set of plaintexts. As opposed to traditional cryptanalysis, the goal is not key recovery but achieving a mimic accuracy greater than …
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Breaking and Building Encrypted Databases
… must leak some information about the underlying plaintext data and queries. The leakage and its impact on security differs depending on the way the system is compromised. In this thesis, I investigate the performance-security tradeoffs made by encrypted databases. First, I study current encrypted …
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Lightweight Cryptography for Internet of Things (IoT): Ascon-based Authentication Efficiency and Performance Analysis on STM32 Microcontroller
… MHz and from 1.707ms to 29.647 ms at 80 MHz for plaintext sizes of 16-1024 bytes. In the Wi-Fi execution at 80 MHz, measured authentication routine latency ranges from 1.420 ms to 3.479 ms for 16-128-byte payloads. Across both settings, results confirm that Ascon-AEAD128 can deliver practical …
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COMPARING PRIVACY-PRESERVING QUERY PROCESSING OVER OUTSOURCED ENCRYPTED DATA AND MULTI-PARTY COMPUTATION.
… purpose, data owners are not willing to share plaintext data with other parties or outsource plaintext to the service provider as well. A traditional solution to ensure privacy protection consists in adopting encryption scheme in order to help preventing information leakage. Such traditional …
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PFHE: partially homomorphic encryption on CNN inference
… of input while processing the remaining parts in plaintext. Our method significantly reduces computational cost without compromising data confidentiality. We developed a new data layout for ciphertexts to utilize the sparse nature of the data. Besides that, we first leverage the capability of FHE …
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A pseudo one-time-pad based security system
… an exclusive-or Boolean operation with the plaintext message. The problem of distributing a truly random One-Time-Pad to a remote location has severely limited the applicability of the Vernam Cipher for industrial, commercial, and personal use. A pseudo One-Time-Pad-based security system is …
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A Novel Physical Layer Key Generation and Authenticated Encryption Protocol Exploiting Shared Randomness
… is semantically secure with respect to chosen plaintext and chosen cipher text attacks. Secondly, in order to increase the rate in bits per seconds at which agreed cryptographic keys are been generated, a multi-level quantization algorithm with public feedback is discussed. It is demonstrated …
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PARTE : automatic program partitioning for efficient computation over encrypted data
… environment. The second partition must have plaintext access to sensitive data and therefore should be run in a trusted environment. Program execution will flow between the partitions, levaraging third party resources when data leakage risk is low. Further, we identify operations which, if …
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End-to-end security in active networks
… reasonable to give active routers access to the plaintext of these flows. After considering the various security problem introduced, such as vulnerability to attacks on intermediaries or coercion, it concludes not. We then ask if active network systems can be built that maintain end-to-end …
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Towards Secure Outsourced Data Services in the Public Cloud
… and achieves the performance comparable to the plaintext cloud storage deduplication while effectively mitigating the information leakage from the low-entropy chunks. On the other hand, we comprehensively study the promising yet challenging issue of search over encrypted data in the cloud …
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Preventing encrypted traffic analysis
… can be used to recover part or all of the plaintext being encrypted. The prevalence of encrypted protocols as the underpinning of such critical services as e-commerce, remote login, and anonymity networks and the increasing feasibility of attacks on these services represent a considerable …
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