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Diagram signature diploma

[Music] hello friends welcome to our channel so in this today's session let us have a look on digital signature algorithm so far we have seen different algorithms that is a cryptographic algorithms which provides their security and then authentication algorithms which provides the authentication and key exchange algorithms where we have to exchange the secret key among the sender and receiver now in this session let us have a look on another bomb or security service that is digital signature algorithm so before going to the algorithm first we have to know what is the distress signal so as we move that in the symmetric encryption so we will be having a two different case one is a public key and another one is a private key where the public is available for all the users and the private key will be not shareable only it will be with a particular person right so if the message is encrypted using send a private key so this is very important so if the message or hash code or anything if the encryption is done using the sender's private key then automatically we call it as a digital signature so here the private key is not shareable so only the user or a sender can only send the message because the sender will not share their private key with any other user so the message can be encrypted only by the sender so that's why we call this process as a digital signature right so once again attributing that if the L Christian so here obviously the encryption will be done at the sender side and the decryption will be done at the receiver side so if the encryption is done by using sender's private key then automatically we can say this process as a digital signature see let us see that so consider the plaintext message English message so apply the hash functions so that we will get Ashford so this is the hash code which is appended with the plaintext message which is encrypted by using I would key obviate here you fit is game and if it is B here then the message will be in this form this is the hash board so this is the encrypted message and then we see outside it is fostered decrypted by using public key of relay which is available with all the users so that we will get again the plaintext message and hash code where again hash functions are applied so that we will get some hash board and this appended hash code will be compared so if the message has been sent like this we can say it as a discharge ignition because of the same person we are using them privately so here in this distant signature approach we have two approaches for this texture signatures what is RSA approach another one is DSS approach so this we can call it as a DSS or DAC or...