[Design] Cryptographic standard, AES and RSA - Shuatiblog.com

[Design] Cryptographic standard, AES and RSA - Shuatiblog.com

3 areas of cryptographic standard:

1. encryption standard

   1. Data Encryption Standard (obsolete)
   2. Triple DES
   3. Advanced Encryption Standard (AES)
   4. RSA
   5. OpenPGP
   6. CipherSaber

2. hash standard

   1. MD5
   2. SHA-1
   3. SHA-2
   4. HMAC
   5. PBKDF2

3. digital signature standard

   1. Digital Signature Algorithm (DSA)
   2. RSA
   3. Elliptic

Symmetric-key algorithm

Use the same cryptographic keys for both encryption and decryption.

The keys represent a shared secret between two parties, and maintain a private information link.

This requirement that both parties have access to the secret key is one of the main drawbacks.

Public-key cryptography

The public key is used:

1. encrypt plaintext
2. verify a digital signature

private key is used:

1. decrypt ciphertext
2. create a digital signature.

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