Recently the CFCA published their 2015 CFCA Global Fraud Survey results, and for the first time Global Telecom Fraud Decreases By 18% from the previous survey (in 2013).
This does not mean enterprises are safe, just that fraudsters are moving on to easier targets: phishing and direct call requests/demands for cash.
For full details go to the CFCA site for the report: www.cfca.org/fraudlosssurvey
