Module 1 Services , Mechanism and Attack Network Security model Keyed and keyless transposition technique Numericals: Playfair (But practice all) Module 2 Block cipher modes DES and Triple DES RSA Diffie...
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Digital Signature : As the name sounds are the new alternative to sign a document digitally. It ensures that the message is sent by the intended user without any tampering by any third party (attacker)....
Answer to : User A and B want to use RSA to communicate securely. A chooses public key as (7, 119) and B chooses public key as (13, 221). Calculate their private keys. A wishes to send message m...
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Answer to : What is need of Diffie-Hellman algorithm. User A and B decide to use Diffie-Hellman algorithm to share a key. They choose p = 23 and g = 5 as the public parameters. Their secret keys...
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An X.509 digital certificate is a standard format for public key certificates used in various internet protocols, such as TLS/SSL for secure communication, S/MIME for secure email, and others. It contains...
Encrypt “The key is hidden under the door” using playfair cipher with keyword “domestic”. Playfair Matrix in step 1 (draw it in step 1 only ) : D O M E S T I C A B F G H K L N P Q...
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Playfair Matrix: D O M E S T I C A B F G H K L N P Q R U V W X Y Z Encrypted Message: CFARAEBOGCMVOSPNVTAYCFSOMWEP
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Security services A processing or communication service that enhances the security of the data processing systems and the information transfers of an organization. These services are intended to counter...
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Database security involves implementing measures to protect a database from unauthorized access, data corruption, and other threats. Its requirements include ensuring confidentiality, integrity, availability,...
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Properties/ characteristics of hash functions To be a reliable cryptographic tool, the hash function should have the following charactersitcs − Pre-Image Resistance According to this feature,...
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