Initialization vector: Difference between revisions

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m Corrected "random" to "unpredicable". One way to provide an unpredictable value is random, but there are other ways. See Appendix C of NIST's Recommendations for Cipher Block Modes of Operation.
Removed irrelevant paragraph.
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Depending on whether the IV for a cryptographic scheme must be random or only unique the scheme is either called ''randomized'' or ''stateful''. While randomized schemes always require the IV chosen by a sender to be forwarded to receivers, stateful schemes allow sender and receiver to share a common IV state, which is updated in a predefined way at both sides.
The recommended solution to WEP security problem is to switch to WPA2. WPA was an intermediate solution for hardware that could not support WPA2. Both WPA and WPA2 are more secure than WEP. To add support for WPA or WPA2, some old WI-FI access points might need to be replaced or have their firmware upgraded. WPA was designed as an interim software-implementable solution for WEP that could be used safely while awaiting new hardware. However, TKPI (the basis of WPA) has teached the end of its designed life time, has been partially broken, and had been officially deprecated with the release of the 802.11.2012 standard.
 
==Block ciphers==