Sentence examples for a key is required from inspiring English sources

A key is required to get onto the walkways.

Gramercy is one of two private parks in New York City (the other, in Queens, is Sunnyside Gardens Park), and a key is required not only to enter, but to leave through a gate in its wraparound wrought-iron fence.

A key is required for scrambling both the templates and the query images.

However, a key is required for both scrambling and image matching, and the key must be kept secret from attackers.

To decipher this code, and thus determine the value of the vote, a numerical key is required.

Unlike compaction in audio coding or extraction of information in classification, to protect the digital audio content addition of information in the form of a security key is required which would then prove the ownership of the audio content.

The CHOYCE server is freely available via the URL: http://choyce.ismb.lon.ac.uk/ (a valid licence key is required for the use of the MODELLER software).

A sonic key was required.

However, a large amount of storage for storing the secret keys is required in their scheme.

In each situation, two keys are required to successfully employ a round trip cryptographic operation.

Three independently controlled keys are required to open the vault.