초록 ▼

The securing of a telephone link between the two subscriber sets is established on the basis of encryption keys transmitted over the service channel (D) of the ISDN network whether the link be established on the switched telephone network (PSTN) or on the Internet network (NSTN). A server verifies t

The securing of a telephone link between the two subscriber sets is established on the basis of encryption keys transmitted over the service channel (D) of the ISDN network whether the link be established on the switched telephone network (PSTN) or on the Internet network (NSTN). A server verifies the identifiers of the subscriber taps (PA1, PA2) and stores the encryption keys.

대표청구항 ▼

The securing of a telephone link between the two subscriber sets is established on the basis of encryption keys transmitted over the service channel (D) of the ISDN network whether the link be established on the switched telephone network (PSTN) or on the Internet network (NSTN). A server verifies t

The securing of a telephone link between the two subscriber sets is established on the basis of encryption keys transmitted over the service channel (D) of the ISDN network whether the link be established on the switched telephone network (PSTN) or on the Internet network (NSTN). A server verifies the identifiers of the subscriber taps (PA1, PA2) and stores the encryption keys. et al., 379/203.01; US-5650994, 19970700, Daley, 370/259; US-5661782, 19970800, Bartholomew et al., 379/088.18; US-5703935, 19971200, Raissyan et al., 379/088.18; US-5724417, 19980300, Bartholomew et al., 379/211.05; US-5729598, 19980300, Kay, 379/114.29; US-5764639, 19980600, Staples et al., 370/401; US-5768271, 19980600, Seid et al., 370/389; US-5889845, 19990300, Staples et al., 379/211.02; US-5970477, 19991000, Roden, 705/032; US-6021190, 20000200, Fuller et al., 379/212.01; US-6185283, 20010200, Fuller et al., 379/088.21; US-6292478, 20010900, Farris, 370/352; US-6434537, 20020800, Grimes, 705/040