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<communications, data> (DER) An X.690 encoding format (or transfer syntax) for data structures described by ASN.1 that specifies exactly one way to encode a value thus ensuring a unique, canonical, serialised representation. DER is a restricted variant of BER. For example, DER has exactly one way to encode a Boolean value. DER is used in cryptography, e.g. for digital certificates such as X.509.
(2016-05-05)
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