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Duraiamuthan/Unique identifiers

Created April 5, 2014 09:31
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UDID vs UUID vs GUID
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Unique identifiers
UUID:
It is the acronym of Universally Unique Identifier.
A sequence of 128 bits that can guarantee uniqueness across space and time, defined by RFC 4122.
GUID:
It is the acronym of Globally Unique Identifier
It is Microsoft's implementation of the UUID specification; often used interchangeably with UUID.
In dot net framework its called as Plain GUID and in sql server its called as newid
UDID:
It is the acronym of Unique Device Identifier
It is sequence of 40 hexadecimal characters that uniquely identify an iOS device
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