05-07-2012, 04:43 PM
Verifiable and Retrievable Layer for Cloud storage
Verifiable and Retrievable.ppt (Size: 1,005 KB / Downloads: 29)
Introduction
VRL (Verifiable and Retrievable Layer ), a
distributed cryptographic system that allows a set of
servers to prove to a client that a stored file is intact
and available
Boosts security .
MD5 Calculation and Encryption
Calculation of MD5 hash code for each block of file F
and store
Encryption of each block by AES
Mathematical Module
Time required for splitting file Ts α no. of blocks.
No. of blocks α time required to calculate MD5 and encryption
Calculating MD5 :
4 steps/word(ignoring inter block processing)
Encryption using AES:
3 steps/block(ignoring inter step processing)
Conclusion
VRL is a remote-file integrity checking protocol that offers efficiency, security, and modeling improvements
over straightforward multi-server application, distributed
file-availability proposals.