Cloud technologies are widely used for storage services. However, the single cloud cannot
ensure the reliability of data. To solve the security issue, we present a multi-cloud based
storage architecture called WA-RRNS that combines weighted access scheme and
threshold secret sharing redundant residue number system with multiple failure
detection/recovery mechanisms and homomorphic ciphers. For better tradeoffs between
security and performance, WA-RRNS uses parameters to adjust redundancy, encryption …