The Cellusys-Kaleido signaling security survey contains many other statistics that will trouble risk managers and ordinary phone users.
Researchers Merve Sahin and Aurélien Francillon claimed their method detected 98% of IRSF calls with 0.28% false positives.
The PRISM database of revenue share numbers keeps needing to be refined to allow for changes in the methods used by IRSF and wangiri fraudsters.
How can smaller international carriers compete in a high volume, low margin business? The answer is to deliver quality and prevent fraud.
Why are so few telco fraudsters punished? Is it sufficient to block the top ten IRSF destinations? Does RA suffer a lack of innovation? These and other questions were covered in this week’s episode.
Two Maltese operators suffered losses of USD32,300 after Vodafone Greece SIMs were used to make calls to unallocated UK numbers.
International revenue share fraud (IRSF) is spread far more widely than before, says data from fraud expert Colin Yates.
Instead of telling us that International Revenue Share Fraud is important, vendors should state what they can do to prevent it.
Biaas argues fraudsters exploit destinations on carrier price lists which cannot be used for normal international termination.
National dial plans define how many digits belong in a valid number. Guy Howie says fraudsters and telcos ignore those rules.