Group Selection and Key Management Strategies for Ciphertext-Policy Attribute-Based Encryption

Ciphertext-Policy Attribute-Based Encryption (CPABE) was introduced by Bethencourt, Sahai, and Waters, as an improvement of Identity Based Encryption, allowing fine grained control of access to encrypted files by restricting access to only users whose attributes match that of the monotonic access tree of the encrypted file. Through these modifications, encrypted files can be placed securely on an unsecure server, without fear of malicious users being able to access the files, while allowing each user to have a unique key, reducing the vulnerabilites associated with sharing a key between multiple users. However, due to the fact that CPABE was designed for the purpose of not using trusted servers, key management strategies such as efficient renewal and immediate key revocation are inherently prevented. In turn, this reduces security of the entire scheme, as a user could maliciously keep a key after having an attribute changed or revoked, using the old key to decrypt files that they should not have access to with their new key. Additionally, the original CPABE implementation provided does not discuss the selection of the underlying bilinear pairing which is used as the cryptographic primitive for the scheme. This thesis explores different possibilites for improvement to CPABE, in both the choice of bilinear group used, as well as support for key management that does not rely on proxy servers while minimizing the communication overhead. Through this work, it was found that nonsupersingular elliptic curves can be used for CPABE, and Barreto-Naehrig curves allowed the fastest encryption and key generation in CHARM, but were the slowest curves for decryption due to the large size of the output group. Key management was performed by using a key-insulation method, which provided helper keys which allow keys to be transformed over different time periods, with revocation and renewal through key update. Unfortunately, this does not allow immediate revocation, and revoked keys are still valid until the end of the time period during which they are revoked. Discussion of other key management methods is presented to show that immediate key revocation is difficult without using trusted servers to control access

4-H ewe and lamb club

"June, 1926 ... Third edition, December, 1929.""Prepared by S. F. Russell, Extension Specialist in Animal Husbandry, in collaboration with T. T. Martin, State Club Agent.

Correction to "Energy Transport in the Thermosphere During the Solar Storms of April 2002"

We present corrected computations of the infrared power and energy radiated by nitric oxide (NO) and carbon dioxide (CO2) during the solar storm event of April 2002. The computations in our previous paper underestimated the radiated power due to improper weighting of the radiated power and energy with respect to area as a function of latitude. We now find that the radiation by NO during the April 2002 storm period accounts for 50% of the estimated energy input to the atmosphere from the solar storm. The prior estimate was 28.5%. Emission computed for CO2 is also correspondingly increased, but the relative roles of CO2 and NO remain unchanged. NO emission enhancement is still, far and away, the dominant infrared response to the solar storms of April 2002

Comparison of five different RNA sources to examine the lactating bovine mammary gland transcriptome using RNA-Sequencing.

The objective of this study was to examine five different sources of RNA, namely mammary gland tissue (MGT), milk somatic cells (SC), laser microdissected mammary epithelial cells (LCMEC), milk fat globules (MFG) and antibody-captured milk mammary epithelial cells (mMEC) to analyze the bovine mammary gland transcriptome using RNA-Sequencing. Our results provide a comparison between different sampling methods (invasive and non-invasive) to define the transcriptome of mammary gland tissue and milk cells. This information will be of value to investigators in choosing the most appropriate sampling method for different research applications to study specific physiological states during lactation. One of the simplest procedures to study the transcriptome associated with milk appears to be the isolation of total RNA directly from SC or MFG released into milk during lactation. Our results indicate that the SC and MFG transcriptome are representative of MGT and LCMEC and can be used as effective and alternative samples to study mammary gland expression without the need to perform a tissue biopsy

Petition for a Writ of Habeas Corpus

Sheppard exhausted his available state remedies as required by Title 28, USC, Section 2254. On May 31, 1956, the Supreme Court of Ohio affirmed his conviction, 165 0.S. 293; a petition for rehearing was denied on July 5, 1956. The Supreme Court of the United States denied certiorari, 352 U.S. 910; a petition for rehearing was denied, 352 U.S. 955 . A petition for a writ of habeas corpus was dismissed by the Supreme Court of Ohio, 170 0.S. 551 (1958). Sheppard asserted there were no further avenues of revue open to him in the courts of Ohio, and any proceeding therein would be unavailing, for the Ohio courts generally are so biased and prejudiced against him that he will be denied relief in any event. The petition states that Ohio violated Sheppard\u27s federal constitutional right to a fair and impartial trial, and more specifically his federal constitutional right to counsel. Sheppard\u27s repeated motions for change of venue to a district or locale not saturated by the massive prejudicial and inflammatory publicity stimulated were likewise denied. Claims of the petition focused on the personal influences of the local court judge, reelection publicity, and the local media\u27s inflammatory published opinions amongst numerous incidents of abuse of power by government officials. As a result of the facts and circumstances set forth, petitioner was denied a fair and impartial trial, and was further denied the equal protection of the laws of the state of Ohio; petitioner\u27s trial was not a trial at all, but a sham proceeding conducted and controlled by persons of official responsibility whose primary purpose was to satisfy the populace which had been convinced by irresponsible news media that petitioner was guilty despite the marked lack of evidence tending to prove such guilt; petitioner was subjected to trial by newspaper, and was subjected specifically to the perverted power of the Cleveland Press, which sought to and did cause petitioner to be convicted in violation of his constitutional rights

Affidavit of Poverty and Motion to Proceed in Forma Pauperis in Habeas Corpus Proceedings

While incarcerated in the Ohio State Penitentiary serving a sentence of life imprisonment, Sam Sheppard submitted this affidavit and motion claiming his liberty was restrained in violation of the United States Constitution. Sheppard, insolvent, made this affidavit for the purpose of availing himself of the rights and privileges afforded indigents under Title 28 U.S. C., § 1915

Must naive realists be relationalists?

Relationalism maintains that perceptual experience involves, as part of its nature, a distinctive kind of conscious perceptual relation between a subject of experience and an object of experience. Together with the claim that perceptual experience is presentational, relationalism is widely believed to be a core aspect of the naive realist outlook on perception. This is a mistake. I argue that naive realism about perception can be upheld without a commitment to relationalism

Petition for a Writ of Habeas Corpus

Sheppard exhausted his available state remedies as required by Title 28, USC, Section 2254. On May 31, 1956, the Supreme Court of Ohio affirmed his conviction, 165 0.S. 293; a petition for rehearing was denied on July 5, 1956. The Supreme Court of the United States denied certiorari, 352 U.S. 910; a petition for rehearing was denied, 352 U.S. 955 . A petition for a writ of habeas corpus was dismissed by the Supreme Court of Ohio, 170 0.S. 551 (1958). Sheppard asserted there were no further avenues of revue open to him in the courts of Ohio, and any proceeding therein would be unavailing, for the Ohio courts generally are so biased and prejudiced against him that he will be denied relief in any event. The petition states that Ohio violated Sheppard\u27s federal constitutional right to a fair and impartial trial, and more specifically his federal constitutional right to counsel. Sheppard\u27s repeated motions for change of venue to a district or locale not saturated by the massive prejudicial and inflammatory publicity stimulated were likewise denied. Claims of the petition focused on the personal influences of the local court judge, reelection publicity, and the local media\u27s inflammatory published opinions amongst numerous incidents of abuse of power by government officials. As a result of the facts and circumstances set forth, petitioner was denied a fair and impartial trial, and was further denied the equal protection of the laws of the state of Ohio; petitioner\u27s trial was not a trial at all, but a sham proceeding conducted and controlled by persons of official responsibility whose primary purpose was to satisfy the populace which had been convinced by irresponsible news media that petitioner was guilty despite the marked lack of evidence tending to prove such guilt; petitioner was subjected to trial by newspaper, and was subjected specifically to the perverted power of the Cleveland Press, which sought to and did cause petitioner to be convicted in violation of his constitutional rights