TY  - BOOK
AU  - Abdelrhman Ahmed Elsayed Elshafae
AU  - Khaled Mostafa Elsayed , 
AU  - Salwa Saad Elgamal , 
AU  - Sherif Essam Eldin Khattab , 
TI  - Voice over Internet Protocol security / 
PY  - 2010///
CY  - Cairo : 
PB  - Abdelrhman Ahmed Elsayed Elshafae , 
KW  - Charging
KW  - SIP
KW  - VoIP
N1  - Thesis (M.Sc.) - Cairo University - Faculty of Computers and Information - Department of Computer Science; Issued also as CD
N2  - Voice over Internet Protocol ( VoIP ) provides voice services over Internet Protocol insteat of the traditional Public Switched Telephone Networks ( PSTN ) . Charging is one of the most fundamental components of any commercial VoIP service . We analyzed the security of the SIP - based VoIP service charging by demonstrating the charging attacks that were implemented successfully by manipulating the SIP signaling messages and then investigating the different SIP protection mechanisms to prevent the charging attacks
ER  -