Telecommunications magazine advertisement "Smarter Than Smart ITT Security Modem", p. 106, Apr. 1986. |
Telecommunications magazine article "Securing Dial-Up Networks", by J. Holmes, Mar. 1984, pp. 84, 124. |
Telecommunications magazine advertisement "Innovative Products from a Data Communications Leader", p. 37, Apr. 1986, vol. 20, No. 4. |
Bloom, Paul et al. "A Network Solution for Improved Security for Computer Access," Oct. 1988, pp. 379-382. Proceedings of the 9th International Conference on Computer Communication (Oct. 30-Nov. 3, 1988). (English). |