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Cryptography is the art of ensuring information security and protection.

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To convert any informational piece into a hidden message in order to safeguard against unauthorized access

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We need keys to convert any information into a secret message. In the case of symmetric encryption, both the sender and the receiver can decrypt the message using the same key.

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In case of asymmetric encryption, two keys are used to encrypt and decrypt the messages: Public key and Private key. If the public key is used for encryption, private key will be used for decryption, and vice-versa.

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This algorithm doesn't need any keys at all. The plain text is used to generate a hash value that has a set length, making it hard to decipher the plain text's

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1. It protects the confidentiality of the information by encrypting the information.
2. Data integrity is guaranteed by cryptography as the receiver is ensured that the data received has not been tampered with during transmission as digital keys are used to confirm that what is received is real and from the intended sender.
3. Cryptography also supports the availability of data by guaranteeing that individuals with the right permission can use systems and retrieve data in a dependable and timely manner.

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Application of Cryptography - Focus Area

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Application of Cryptography - Focus Area

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1. Password Based Encryption
2. Secure Communications
3. Email E2E Encryption
4. SIM card Authentication
5. Electronic Money

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The term "electronic money" describes funds that can be utilized to support electronic transactions and are stored in banking computer systems. Electronic money is mostly utilized for electronic transactions because of how convenient it is, even if its value is supported by fiat currency and may therefore be converted into a physical, tangible form.

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1. On-line protocol
2. Off-line protocol
3. Untraceable Electronic Payment

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Blind signature techniques are the foundation of anonymous applications, which conceal the customer's identity. Based on more open-ended varieties of signature systems, identified spending schemes make the customer's identity known. There are also some hybrid approaches where payments can be anonymous with respect to the merchant but not the bank ;or anonymous to everyone, but traceable (a sequence of purchases can be related, but not linked directly to the spender’s identity).

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How can we use Cryptography in Electronic Money?

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How can we use Cryptography in Electronic Money?

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Public-key encryption can guarantee confidentiality, digital signatures can take the place of handwritten signatures or credit-card authorizations, and encryption is used in electronic money schemes to secure traditional transaction data such account numbers and transaction amounts.

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Cryptography Algorithms for Electronic Payments

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Cryptography Algorithms for Electronic Payments

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1. Public Key Cryptography
2. RSA Public Key Algorithm
3. Digital Signatures