These transmissions were retained by GCHQ and were available to all cleared staff on the agency intranet.
It is not known if any journalists were intentionally targeted.
The matrix concluded terrorists were therefore a moderate information security risk.
A spokesman for GCHQ said:
It is longstanding policy that we do not comment on intelligence matters.
All our operational processes rigorously support this position.
In addition, the UKs interception regime is entirely compatible with the European convention on human rights.
source: www.techworm.net
