RIPE-MD
Algorithm developed by the European RIPE project, designed to resist known cryptanalytic attacks and produce a hash of 128 bits, a variant of MD4.
ISDN
Network Digital Integrated Services - Telecommunications Network, which allows the transport of digital data from end to end and provides several Teleservices and Media Services.
The main characteristic of a digital network integration services is to enable the aggregation of channels that each have a flow 64 kbit / s per second. Thus, basic access, which has two channels can reach 128 kbit / s per second. A digital network integration services for exchanging sounds, data or images, so you can use to provide services such as telephony, videophone, Fax, emailEtc.. France Telecom sells its digital network integration services as the ISDN.
Roaming
Roaming means in French. This service offered by telecommunications operators allows mobile phone users can call and be called in a foreign country. To do this, operators from different countries to establish agreements so-called roaming, so that phones their subscribers can connect seamlessly to a network (GSM, GPRS or UMTS) Abroad if necessary. This service is clearly paying and call charges vary widely - but generally very high - from one operator to another.
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