What is "spn"

init. (context cryptography English) http://en.wikipedia.org/wiki/Substitution-permutation%20network

SPN may refer to:

In Computer Sciences:

• Substitution-permutation network, a type of mathematical operation used in cipher algorithms
• Shortest Job (or Process) Next, a scheduling algorithm
• Service Principal Name (SPN) used in the Kerberos protocol

Organizations:

• State Policy Network, a U.S. national network of conservative and libertarian think tanks

In Biology and Medicine:

• SialoPhoriN, a protein
• A solitary pulmonary nodule or coin lesion in the lung

In Music:

• Scientific pitch notation, a method to specify musical pitch, by using note name followed by its octave number.

In other areas:

• Common fan abbreviation for Supernatural (U.S. TV series)
• Saipan International Airport (IATA Code: SPN)
• SPN ship project is a Russian river ship project.
• Service Provider Name (SPN) the identity of the GSM (mobile phone) Service Provider, also stored on the Subscriber Identity Module (SIM)