Performance
OCB performance overhead is minimal comparing to classical, non-authenticating modes like CBC. OCB requires one block cipher operation per each block of encrypted and authenticated message and one block cipher operation per each block of additional associated data. There are also two extra encryptions required at the end of process.
For comparison, CCM mode offering similar functionality requires twice as many block cipher operations per each message block (associated data requires one as in OCB).
Read more about this topic: OCB Mode
Famous quotes containing the word performance:
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—William Shakespeare (1564–1616)
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“What avails it that you are a Christian, if you are not purer than the heathen, if you deny yourself no more, if you are not more religious? I know of many systems of religion esteemed heathenish whose precepts fill the reader with shame, and provoke him to new endeavors, though it be to the performance of rites merely.”
—Henry David Thoreau (1817–1862)