Secret Key Algorithms
What is a secret key algorithm?
Types of secret key algorithms
Secret key algorithms
What is a secret key algorithm?
Secret key algorithms use the same key for encryption and decryption (or the decryption key is easily derived from the encryption key), whereas public key algorithms use a different key for encryption and decryption, and the decryption key cannot be derived from the encryption key.
Secret-key algorithms are generally much less computationally intensive than public key algorithms.
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Types of secret key algorithms
Secret key algorithms can be divided into two types - stream ciphers and block ciphers. Stream ciphers encrypt a single bit of plaintext at a time, whereas block ciphers take a number of bits (typically 64 bits in modern ciphers), and encrypt them as a single unit.
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Secret key algorithms
AES/Rijndael
Blowfish
CAST5
DES
IDEA
RC2
RC4
RC6
Serpent
Triple DES
Twofish
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• What is the maximum length of text I can encrypt?
If you use Encryption and Decryption Professional Edition:
- For Windows Vista/XP/2003/2000 max length of text you can encrypt is 524224 characters.
- For Windows 98/ME max length of text you can encrypt is 32704 characters.
If you use Encryption and Decryption (free version):
Max length of text you can encrypt is 255 characters
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