- Data encryption translate data into another form or code so that only people with access to a secret key or password can read it.
- Encrypted data commonly referred to as cipher text while un-encrypted data is called plain-text.
- Currently encryption is one of the most popular and effective data security methods used by organization.
Types:
Symmetric Encryption:
- It is also called private key cryptography.
- Same key used to encrypt and decrypt.
- Faster compare to asymmetric encryption.
- The problem with this method of encryption is order for data to be decrypted, the key must be available.
- This causes two problems 1st problem is the key needs to stored securely.
- If attacker were to gain access to this key they could decrypt any data that key was used to encrypt.
- 2nd problem is secure channel required to transfer the key.
Asymmetric Encryption:
- It is also called as public key cryptography.
- Used both public and private keys.
- Slower compare to symmetric key.
- With this method, a public key is freely available to everyone and is used to encrypt message, and different private key is used by recipient to decrypt message.
How Encryption Work:
- Encryption is an interesting piece of technology that works by scrambling data so it is unreadable by unintended parties.
- Say i want to send you a private message, so i encrypt it using either one of the technologies.
- Once encrypted, the message literally becomes a jumbled mess of random characters. But equipped with the secret passcode.
- You can decrypt it and find the original message.
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| Encrypted Data |
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| Decrypted Data |
- Triple DES
- RSA
- Blowfish
- PGP
- Twofish
- AES
Advantages:
- Secure the data.
- Identity theft protection.
- Unauthorized Access protection.
Disadvantages:
- It is very complex technology.
- One big disadvantage of encryption as it relates to keys is that the security of data becomes the security of encryption key, lose that key, and you lose the data.
Examples:
My notes images:
