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Applications of Graph theory in Cryptography have recently gained momentum. In the last two decades new methods of encryption and decryption using extremal graph theory and expander graphs have been proposed. In this work, new algorithms for binary encoding and decoding are designed. These algorithms use Hadamard encoding by generating random Hadamard matrices of order 16 × 16 from strongly regular...
Cryptography allows a person to encrypt/decrypt the content if s/he has the secret key. Since a key can in itself be inadvertently disclosed, stolen, guessed or computed using various brute force mechanisms, there is a need for adding intelligence to the encryption and decryption process. Context-based content sharing system will allow a person to decrypt content not just based on him/her having the...
In this work, we have proposed a mobility based secure checkpointing and log based rollback recovery technique to provide fault tolerance to mobile hosts in infrastructured wireless/mobile computing system, like, wireless cellular network. Mobility based checkpointing limits number of scattered checkpoint or logs in different mobile support stations that remain due to movement of mobile hosts. Secure...
Digital signature certificates are digitally signed identity certificates issued by trusted Certification Authorities (CA's) to individuals, devices, applications, or services. E-mail Certificates (EC's) are issued primarily for the purpose of signing and encrypting e-mail messages. E-mail clients use sender's E-mail Certificate (Private Key) for signing and recipient's E-mail Certificate (Public...
With the ever increasing demand for secure transactions in banking and also in mail delivery systems, encryption and decryption using cryptography plays a very important role. Nowadays, with 90% of secure transactions occurring on smart phones and other hand-held devices, a low on-chip area and a high speed algorithm to perform the same becomes the need for the day. In order to meet this requirement,...
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