encryption, integrity and non-repudiation
TRANSCRIPT
Encryption, Integrity and Non-repudiationSimplified
Mahendra Pratap SinghMS Cyber Law & Security, Lead Auditor ISO 27001Team Whitehat People
Email: [email protected]: www.linkedin.com/in/mpsingrathoreFacebook: www.facebook.com/mpsinghrathore1Website: www.mpsinghrathore.comTwitter: @mpsinghrathore
Confidentiality
Symmetric encryption:-
In this encryption, a secret key is shared between both the parties to encrypt and decrypt message at source and destination respectively.
Asymmetric encryption:- (aka PKI)
This encryption requires 2 separate keys; one is private and another is public. In next slides usage of public and private keys is explained by flow chart to achieve confidentiality, integrity and non-repudiation.
Confidentiality
Sender (S) Recipient (R)
Sender encrypts message using recipient’s Public key at source.
Message is decrypted at destination using recipient's Private key
01011100100110110
Authenticity & Non-repudiation
Sender (S) Recipient (R)
Sender encrypts message using sender’s Private key at source.
Message is decrypted at destination using sender’s Public key
Integrity: Digital Signature
Message Message Hash
Encrypted Hash
Hash Algorithm
Digital Signature
Encrypted by private key of signer.
Transmission
Encrypted Hash
Message Hash
Decrypted by public key of signer.
Integrity: Digital Signature
If decrypted message hash value at destination matches with second message hash computed at destination, Integrity is ensured.
By
Mahendra Pratap SinghMS Cyber Law & Security, Lead Auditor ISO 27001
Team Whitehat People
Email: [email protected]: www.linkedin.com/in/mpsingrathoreFacebook: www.facebook.com/mpsinghrathore1Website: www.mpsinghrathore.comTwitter: @mpsinghrathore
Content in slides is best of my understanding with the source.
Thank You