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以下の条件での結果を表示する:
全文: "PRISM" "NSA"
7件中 1-7の結果を表示しています
  • 村田 潔, 折戸 洋子, 福田 康典
    経営情報学会 全国研究発表大会要旨集
    2017年 2017f 巻 F3-1
    発行日: 2017年
    公開日: 2017/11/30
    会議録・要旨集 フリー
    2013年6月からエドワード・スノーデンとその協力者によって行われた,米国の情報機関NSAによる無差別大量監視に関する内部告発が社会に与えた影響について,筆者らは2014年10月~11月に, 日本を含む8か国における,大学生を対象としたアンケート調査ならびに聞取り調査を行った。この国際比較研究の結果,「国家による監視」に対する社会的態度において,日本は調査を行った国の中で特異な存在であることが明らかになった。本研究報告ではこの調査結果に基づき,高度情報化が進む日本社会における「国家による監視」に対する人々の態度の特徴を示し,それがプライバシー保護や個人の自由と自律,民主主義のあり方などに対して持つ意味を明らかにする。
  • Nasato Goto, Akira Kanaoka, Masayuki Okada, Eiji Okamoto
    Journal of Information Processing
    2015年 23 巻 5 号 613-622
    発行日: 2015年
    公開日: 2015/09/15
    ジャーナル フリー
    Given the current security situation on the Internet, it is important to determine the trust of the communication routes between a client and server. However, such determination can only be established by end terminals such as clients and servers, not by intermediate routers or network providers so far. Revelations regarding PRISM and other programs highlight the importance of this issue. In this paper, a method to identify the trust level of a route between a client and a server is proposed that uses packet authentication, Probabilistic Packet Marking (PPM), and knowledge bases maintained by trusted third parties. A prototype system of the proposed method was developed and evaluated, prove its feasibility. To the best of our knowledge, the proposed method is the first for identifying the trust level of a route based on information obtained from intermediate routers or Autonomous Systems (ASs).
  • 情報管理
    2013年 56 巻 4 号 262-266
    発行日: 2013/07/01
    公開日: 2013/07/01
    ジャーナル フリー HTML
  • Lisa Nonaka, Tadashi Isshiki, Satoru Suzuki
    Microbes and Environments
    2002年 17 巻 1 号 26-31
    発行日: 2002年
    公開日: 2002/04/11
    ジャーナル フリー
    The distribution of a newly cloned oxytetracycline (OTC) resistance determinant, Tet 34, was examined among bacterial strains isolated from diseased fish. We analyzed 33 OTC-resistant strains isolated from 1998 to 2000 in Kagawa Prefecture. Tet 34 was detected in 3 of the strains, which were grouped in the genus Vibrio. Minimum inhibitory concentrations (MICs) of the 3 strains were higher than 500 μg/ml in the presence of MgCl2, and 125 or 250 μg/ml in its absence. Tet 34 was found in chromosomal DNA in all positive strains. Polymerase chain reaction (PCR)-denaturing gradient gel electrophoresis of 16S rDNA revealed the 3 strains to have the same migration profiles. The sequences of their PCR products were also identical, suggesting that the species were the same. It was concluded that Tet 34 has been present since at least 1998, and the determinant occurs only in Vibrio species.
  • Laura Chiş, Monica Hriscu, Adriana Bica, Monica Toşa, Gergely Nagy, Gergely Róna, Beata G. Vértessy, Florin Dan Irimie
    The Journal of General and Applied Microbiology
    2013年 59 巻 2 号 119-134
    発行日: 2013年
    公開日: 2013/06/11
    ジャーナル フリー
    A thermophilic strain producing an extracellular esterase/lipase was isolated from a hot spring in Tăşnad, Romania, and was identified phenotypically and by 16S rDNA sequencing as Anoxybacillus flavithermus (GenBank ID: JQ267733). The gene encoding the putative carboxyl esterase (GenBank ID: JX494348) was cloned by direct PCR amplification from genomic DNA. The protein, consisting of 246 amino acids and having a predicted molecular weight of 28.03 kDa, is encoded by an ORF of 741 bps. Expression was achieved in Escherichia coli and a recombinant protein with esterolytic activity and estimated molecular weight of 25 kDa was recovered and purified from the periplasmic fraction by IMAC. The purified enzyme, most active at 60−65°C and in the near-neutral range (pH 6.5−8), displayed a half-life at 60°C of about 5 h. Est/Lip displayed a relative tolerance to methanol, DMSO, acetonitrile, and low detergent concentrations (SDS, Triton) increased its thermostability. Highest activity was attained with p-nitrophenyl butyrate, but the enzyme was also able to hydrolyze long chain fatty acid esters, as well as triolein. The primary sequence and predicted tridimensional structure of the enzyme are very similar to those of other Anoxybacillus and Geobacillus carboxyl esterases in a distinct, recently described lipase family. Est/Lip was highly enantioselective, with preference for the (S)-enantiomer of substrates.
  • Ka Po Ng
    オーストラリア研究
    2014年 27 巻 94-109
    発行日: 2014/03/20
    公開日: 2017/05/10
    ジャーナル フリー
    'Choosing' between two alternatives is always at the core of Australian foreign policy debates. As reflected in current discourses, the seemingly conflicting choice this time is between the nation's alliance relationship with the United States and its economic partnership with China. Although various governments have consistently denied the need to choose, the concern about being forced to make such a choice is evident. This essay argues that this 'binary choice' is a false policy presumption. First, Australia does not have to choose because a redistribution of power is still in progress, and the nature of China's rise is not yet clear. No major actor in international relations, including the United States, is ready to commit to a particular course of foreign policy towards China. Hedging their bets therefore represents the best strategy for middle powers like Australia. Second, Australia would not be 'choosing' as defined by the rationalist tradition, because there are built-in factors that are shaping the 'choices' and guiding its 'choosing.' Among these are culture, ideology, experiences of interaction and level of trust. Third, the issue is beyond Australia's choosing because its national interests lie in a regional order, the making of which is not a matter of its choosing. The development of regional politics will not even necessarily be decided by an agreement between the United States and China. Complicated alliance networks may trap the United States in foreign policy dilemmas and put it on a slippery slope. Therefore, Australia should not narrow its perspective to the relations between the United States and China, but rather take a broader regional or even global view.
  • 佐藤 直
    安全工学
    2015年 54 巻 6 号 417-423
    発行日: 2015/12/15
    公開日: 2016/07/01
    ジャーナル フリー
    サイバー空間の事件や事故に関わる動向を調査したので報告する.最初に,標的型メールを用いた個人情報窃取事件など,昨今頻発しているサイバー攻撃の発生状況や傾向を示す.また,産業制御システムへの攻撃動向について報告する.次に,サイバー攻撃の要因となっているマルウェアや脆弱性の動向を述べる.特に,遠隔操作マルウェアが猛威をふるっていることを示す.脆弱性については,オープンソースソフトウェアに欠陥が見つかり,大きな衝撃を与えたことを述べる.さらに,暗号プロトコルやコンピュータOS といった基盤技術にも深刻な脆弱性が続けて発覚したことを示す.最後に,匿名通信を用いたHidden Service の動向を述べる.Hidden Service ではその秘匿性の高さから違法コンテンツの売買や違法作業請負が堂々とおこなわれていることを示す.
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