Document (#14048)

Author
McMurdo, G.
Title
Pretty good encryption
Source
Journal of information science. 22(1996) no.2, S.133-146
Year
1996
Abstract
The use of codes and other methods of concealing the contents of messages is as old as recorded information. With the advent of computer communication, the need for a method of ensuring secure communication over insecure channels, such as the Internet, has seen an increased demand for good cryptography. However, the recent availability of public domain public key encryption software, such as Philip R. Zimmermann's Pretty Good privacy (PGP), has been seen by some as betraying the principles of security and has raised issues of national communication policy and personal privacy. In the USA, the government's Clipper encryption chip initiative sought to implement a key escrow system which would enable law enforcement agencies to wiretap all digital communication. Civil liberty opponents of key escrow systems argue that they will not affect criminals, and fear that they can only be made effective by banning the use of alternative encryption systems, such as PGP. Describes methods for obtaining and using PGP to encrypt and decrypt electronic mail messages
Theme
Internet
Object
PGP

Similar documents (author)

  1. McMurdo, G.: Indexing the Internet (1994) 6.19
    6.190705 = sum of:
      6.190705 = weight(author_txt:mcmurdo in 2178) [ClassicSimilarity], result of:
        6.190705 = fieldWeight in 2178, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.905128 = idf(docFreq=5, maxDocs=44218)
          0.625 = fieldNorm(doc=2178)
    
  2. McMurdo, G.: Evaluating Web information and design (1998) 6.19
    6.190705 = sum of:
      6.190705 = weight(author_txt:mcmurdo in 2831) [ClassicSimilarity], result of:
        6.190705 = fieldWeight in 2831, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.905128 = idf(docFreq=5, maxDocs=44218)
          0.625 = fieldNorm(doc=2831)
    
  3. McMurdo, G.: How the Internet was indexed (1995) 6.19
    6.190705 = sum of:
      6.190705 = weight(author_txt:mcmurdo in 2411) [ClassicSimilarity], result of:
        6.190705 = fieldWeight in 2411, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.905128 = idf(docFreq=5, maxDocs=44218)
          0.625 = fieldNorm(doc=2411)
    
  4. McMurdo, G.; Meadows, A.J.: Acceptance and use of computer-mediated communication by information students (1996) 4.95
    4.952564 = sum of:
      4.952564 = weight(author_txt:mcmurdo in 7667) [ClassicSimilarity], result of:
        4.952564 = fieldWeight in 7667, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.905128 = idf(docFreq=5, maxDocs=44218)
          0.5 = fieldNorm(doc=7667)
    

Similar documents (content)

  1. Poulter, A.: Cyptography and records management (1996) 0.19
    0.18532817 = sum of:
      0.18532817 = product of:
        1.1583011 = sum of:
          0.036698807 = weight(abstract_txt:public in 6675) [ClassicSimilarity], result of:
            0.036698807 = score(doc=6675,freq=1.0), product of:
              0.08494212 = queryWeight, product of:
                1.350716 = boost
                4.6084785 = idf(docFreq=1197, maxDocs=44218)
                0.013645877 = queryNorm
              0.43204486 = fieldWeight in 6675, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.6084785 = idf(docFreq=1197, maxDocs=44218)
                0.09375 = fieldNorm(doc=6675)
          0.3108657 = weight(abstract_txt:cryptography in 6675) [ClassicSimilarity], result of:
            0.3108657 = score(doc=6675,freq=4.0), product of:
              0.17648467 = queryWeight, product of:
                1.3767054 = boost
                9.394302 = idf(docFreq=9, maxDocs=44218)
                0.013645877 = queryNorm
              1.7614317 = fieldWeight in 6675, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                9.394302 = idf(docFreq=9, maxDocs=44218)
                0.09375 = fieldNorm(doc=6675)
          0.022608843 = weight(abstract_txt:such in 6675) [ClassicSimilarity], result of:
            0.022608843 = score(doc=6675,freq=1.0), product of:
              0.07039975 = queryWeight, product of:
                1.5060302 = boost
                3.4255946 = idf(docFreq=3909, maxDocs=44218)
                0.013645877 = queryNorm
              0.3211495 = fieldWeight in 6675, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4255946 = idf(docFreq=3909, maxDocs=44218)
                0.09375 = fieldNorm(doc=6675)
          0.7881278 = weight(abstract_txt:encryption in 6675) [ClassicSimilarity], result of:
            0.7881278 = score(doc=6675,freq=2.0), product of:
              0.6562756 = queryWeight, product of:
                5.3095856 = boost
                9.05783 = idf(docFreq=13, maxDocs=44218)
                0.013645877 = queryNorm
              1.2009099 = fieldWeight in 6675, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                9.05783 = idf(docFreq=13, maxDocs=44218)
                0.09375 = fieldNorm(doc=6675)
        0.16 = coord(4/25)
    
  2. Flower, J.: Network confidential (1994) 0.14
    0.14481466 = sum of:
      0.14481466 = product of:
        0.7240733 = sum of:
          0.012410193 = weight(abstract_txt:systems in 718) [ClassicSimilarity], result of:
            0.012410193 = score(doc=718,freq=1.0), product of:
              0.04655807 = queryWeight, product of:
                3.4118783 = idf(docFreq=3963, maxDocs=44218)
                0.013645877 = queryNorm
              0.26655298 = fieldWeight in 718, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4118783 = idf(docFreq=3963, maxDocs=44218)
                0.078125 = fieldNorm(doc=718)
          0.022280354 = weight(abstract_txt:methods in 718) [ClassicSimilarity], result of:
            0.022280354 = score(doc=718,freq=1.0), product of:
              0.068773955 = queryWeight, product of:
                1.2153867 = boost
                4.146752 = idf(docFreq=1900, maxDocs=44218)
                0.013645877 = queryNorm
              0.32396498 = fieldWeight in 718, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.146752 = idf(docFreq=1900, maxDocs=44218)
                0.078125 = fieldNorm(doc=718)
          0.018840702 = weight(abstract_txt:such in 718) [ClassicSimilarity], result of:
            0.018840702 = score(doc=718,freq=1.0), product of:
              0.07039975 = queryWeight, product of:
                1.5060302 = boost
                3.4255946 = idf(docFreq=3909, maxDocs=44218)
                0.013645877 = queryNorm
              0.2676246 = fieldWeight in 718, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4255946 = idf(docFreq=3909, maxDocs=44218)
                0.078125 = fieldNorm(doc=718)
          0.20613329 = weight(abstract_txt:messages in 718) [ClassicSimilarity], result of:
            0.20613329 = score(doc=718,freq=4.0), product of:
              0.1909361 = queryWeight, product of:
                2.0251002 = boost
                6.9093957 = idf(docFreq=119, maxDocs=44218)
                0.013645877 = queryNorm
              1.0795931 = fieldWeight in 718, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                6.9093957 = idf(docFreq=119, maxDocs=44218)
                0.078125 = fieldNorm(doc=718)
          0.4644088 = weight(abstract_txt:encryption in 718) [ClassicSimilarity], result of:
            0.4644088 = score(doc=718,freq=1.0), product of:
              0.6562756 = queryWeight, product of:
                5.3095856 = boost
                9.05783 = idf(docFreq=13, maxDocs=44218)
                0.013645877 = queryNorm
              0.707643 = fieldWeight in 718, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.05783 = idf(docFreq=13, maxDocs=44218)
                0.078125 = fieldNorm(doc=718)
        0.2 = coord(5/25)
    
  3. Thelwall, M.; Wilkinson, D.: Public dialogs in social network sites : What is their purpose? (2010) 0.07
    0.07356348 = sum of:
      0.07356348 = product of:
        0.3065145 = sum of:
          0.01650443 = weight(abstract_txt:they in 3327) [ClassicSimilarity], result of:
            0.01650443 = score(doc=3327,freq=1.0), product of:
              0.05630448 = queryWeight, product of:
                1.0996994 = boost
                3.7520406 = idf(docFreq=2820, maxDocs=44218)
                0.013645877 = queryNorm
              0.29312816 = fieldWeight in 3327, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7520406 = idf(docFreq=2820, maxDocs=44218)
                0.078125 = fieldNorm(doc=3327)
          0.022280354 = weight(abstract_txt:methods in 3327) [ClassicSimilarity], result of:
            0.022280354 = score(doc=3327,freq=1.0), product of:
              0.068773955 = queryWeight, product of:
                1.2153867 = boost
                4.146752 = idf(docFreq=1900, maxDocs=44218)
                0.013645877 = queryNorm
              0.32396498 = fieldWeight in 3327, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.146752 = idf(docFreq=1900, maxDocs=44218)
                0.078125 = fieldNorm(doc=3327)
          0.043249957 = weight(abstract_txt:public in 3327) [ClassicSimilarity], result of:
            0.043249957 = score(doc=3327,freq=2.0), product of:
              0.08494212 = queryWeight, product of:
                1.350716 = boost
                4.6084785 = idf(docFreq=1197, maxDocs=44218)
                0.013645877 = queryNorm
              0.50916976 = fieldWeight in 3327, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.6084785 = idf(docFreq=1197, maxDocs=44218)
                0.078125 = fieldNorm(doc=3327)
          0.026644776 = weight(abstract_txt:such in 3327) [ClassicSimilarity], result of:
            0.026644776 = score(doc=3327,freq=2.0), product of:
              0.07039975 = queryWeight, product of:
                1.5060302 = boost
                3.4255946 = idf(docFreq=3909, maxDocs=44218)
                0.013645877 = queryNorm
              0.3784783 = fieldWeight in 3327, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.4255946 = idf(docFreq=3909, maxDocs=44218)
                0.078125 = fieldNorm(doc=3327)
          0.103066646 = weight(abstract_txt:messages in 3327) [ClassicSimilarity], result of:
            0.103066646 = score(doc=3327,freq=1.0), product of:
              0.1909361 = queryWeight, product of:
                2.0251002 = boost
                6.9093957 = idf(docFreq=119, maxDocs=44218)
                0.013645877 = queryNorm
              0.53979653 = fieldWeight in 3327, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.9093957 = idf(docFreq=119, maxDocs=44218)
                0.078125 = fieldNorm(doc=3327)
          0.09476834 = weight(abstract_txt:communication in 3327) [ClassicSimilarity], result of:
            0.09476834 = score(doc=3327,freq=2.0), product of:
              0.18054472 = queryWeight, product of:
                2.7849019 = boost
                4.750873 = idf(docFreq=1038, maxDocs=44218)
                0.013645877 = queryNorm
              0.5249023 = fieldWeight in 3327, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.750873 = idf(docFreq=1038, maxDocs=44218)
                0.078125 = fieldNorm(doc=3327)
        0.24 = coord(6/25)
    
  4. Wu, Z.; Xie, J.; Pan, J.; Su, X.: ¬An effective approach for the protection of user privacy in a digital library (2019) 0.07
    0.072884046 = sum of:
      0.072884046 = product of:
        0.60736704 = sum of:
          0.015072562 = weight(abstract_txt:such in 5782) [ClassicSimilarity], result of:
            0.015072562 = score(doc=5782,freq=1.0), product of:
              0.07039975 = queryWeight, product of:
                1.5060302 = boost
                3.4255946 = idf(docFreq=3909, maxDocs=44218)
                0.013645877 = queryNorm
              0.21409966 = fieldWeight in 5782, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4255946 = idf(docFreq=3909, maxDocs=44218)
                0.0625 = fieldNorm(doc=5782)
          0.22076744 = weight(abstract_txt:privacy in 5782) [ClassicSimilarity], result of:
            0.22076744 = score(doc=5782,freq=8.0), product of:
              0.18408115 = queryWeight, product of:
                1.9884156 = boost
                6.784232 = idf(docFreq=135, maxDocs=44218)
                0.013645877 = queryNorm
              1.1992941 = fieldWeight in 5782, product of:
                2.828427 = tf(freq=8.0), with freq of:
                  8.0 = termFreq=8.0
                6.784232 = idf(docFreq=135, maxDocs=44218)
                0.0625 = fieldNorm(doc=5782)
          0.37152702 = weight(abstract_txt:encryption in 5782) [ClassicSimilarity], result of:
            0.37152702 = score(doc=5782,freq=1.0), product of:
              0.6562756 = queryWeight, product of:
                5.3095856 = boost
                9.05783 = idf(docFreq=13, maxDocs=44218)
                0.013645877 = queryNorm
              0.56611437 = fieldWeight in 5782, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.05783 = idf(docFreq=13, maxDocs=44218)
                0.0625 = fieldNorm(doc=5782)
        0.12 = coord(3/25)
    
  5. Robbin, A.; Koball, H.: Seeking explanation in theory : reflections on the social practices of organizations that distribute public use microdata files for research purposes (2001) 0.07
    0.07052534 = sum of:
      0.07052534 = product of:
        0.35262668 = sum of:
          0.06419068 = weight(abstract_txt:ensuring in 6852) [ClassicSimilarity], result of:
            0.06419068 = score(doc=6852,freq=1.0), product of:
              0.11052163 = queryWeight, product of:
                1.0894597 = boost
                7.4342074 = idf(docFreq=70, maxDocs=44218)
                0.013645877 = queryNorm
              0.58079743 = fieldWeight in 6852, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.4342074 = idf(docFreq=70, maxDocs=44218)
                0.078125 = fieldNorm(doc=6852)
          0.022280354 = weight(abstract_txt:methods in 6852) [ClassicSimilarity], result of:
            0.022280354 = score(doc=6852,freq=1.0), product of:
              0.068773955 = queryWeight, product of:
                1.2153867 = boost
                4.146752 = idf(docFreq=1900, maxDocs=44218)
                0.013645877 = queryNorm
              0.32396498 = fieldWeight in 6852, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.146752 = idf(docFreq=1900, maxDocs=44218)
                0.078125 = fieldNorm(doc=6852)
          0.061164677 = weight(abstract_txt:public in 6852) [ClassicSimilarity], result of:
            0.061164677 = score(doc=6852,freq=4.0), product of:
              0.08494212 = queryWeight, product of:
                1.350716 = boost
                4.6084785 = idf(docFreq=1197, maxDocs=44218)
                0.013645877 = queryNorm
              0.7200748 = fieldWeight in 6852, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.6084785 = idf(docFreq=1197, maxDocs=44218)
                0.078125 = fieldNorm(doc=6852)
          0.13797964 = weight(abstract_txt:privacy in 6852) [ClassicSimilarity], result of:
            0.13797964 = score(doc=6852,freq=2.0), product of:
              0.18408115 = queryWeight, product of:
                1.9884156 = boost
                6.784232 = idf(docFreq=135, maxDocs=44218)
                0.013645877 = queryNorm
              0.7495588 = fieldWeight in 6852, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.784232 = idf(docFreq=135, maxDocs=44218)
                0.078125 = fieldNorm(doc=6852)
          0.067011334 = weight(abstract_txt:communication in 6852) [ClassicSimilarity], result of:
            0.067011334 = score(doc=6852,freq=1.0), product of:
              0.18054472 = queryWeight, product of:
                2.7849019 = boost
                4.750873 = idf(docFreq=1038, maxDocs=44218)
                0.013645877 = queryNorm
              0.37116197 = fieldWeight in 6852, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.750873 = idf(docFreq=1038, maxDocs=44218)
                0.078125 = fieldNorm(doc=6852)
        0.2 = coord(5/25)