Railroad officials said the Broadway station had been identified as one that needed a barrier to prevent illegal dumping and deny unauthorized access to the tracks.
These techniques are required to ensure access control and prevent illegal copying of digital maps.
He added, "But it adds nothing new to the debate about the most effective way to prevent illegal underage drinking, which is clearly restricting youth access to alcohol, not censoring advertising".
Traditional access control mechanisms aim to prevent illegal actions a-priori occurrence, i.e. before granting a request for a document.
On immigration, the government said its new measures would seek to stop immigrants from using public services to which they are not entitled, make it harder to appeal deportation orders, regulate access to health care for immigrants, and prevent illegal immigrants from obtaining driver's licenses.
He plans to file legislation Wednesday that would enhance background checks, close licensing loopholes, reduce access to high-powered rounds of ammunition and prevent illegal firearm possession.
As well as securing the wireless link between IMD and programmer, access to IMD should be carefully controlled to prevent illegal exposure of the patient data and life-threatening modification of its settings.
The principle of watermarking is to embed a digital code (watermark) within the host multimedia document, and to use such a code to prove ownership, to prevent illegal copying, to give some indications about the watermarked data or to enable the access to enhanced versions of the content or to additional services.
In March, Senator Hollings introduced a bill to prevent illegal copying of intellectual property, like music recordings, television programs and movies, and to spur growth of high-speed Internet access.
Efforts to prevent illegal logging have also raised tensions.
