Common encryption algorithms

Symmetric encryption algorithm (with the same decryption key)

name	Key Length	Operation Speed	Security	Resource Consumption
Des	56 Guests	More quickly	Low	In
3DES	112-bit or 168-bit	Slow	In	High
Aes	128, 192, 256-bit	Fast	High	Low

asymmetric algorithm (encryption key and decryption key differ)

name	Maturity Level	security (depends on key length)	Operation Speed	Resource Consumption
Rsa	High	High	Slow	High
Dsa	High	High	Slow	Can only be used for digital signatures
Ecc	Low	High	Fast	Low (less compute, less storage footprint, lower bandwidth requirements)

Hash algorithm Comparison

name	Security	Speed
SHA-1	High	Slow
MD5	In	Fast

comparison of symmetric and asymmetric algorithms

name	Key Management	Security	Speed
Symmetric algorithm	More difficult, not suitable for the internet, generally used in internal systems	In	Fast several orders of magnitude (software encryption and decryption speed of at least 100 times times, can decrypt the number of M-bit data per second), suitable for large data volume encryption and decryption processing
Asymmetric algorithms	Key easy to manage	High	Slow, suitable for small data volumes plus decryption or data signing

 

Algorithm selection (from performance and security synthesis)

Symmetric encryption: AES (128-bit),

Asymmetric encryption: ECC (160-bit) or RSA (1024x768),

Message digest: MD5

Digital signature:DSA

Common encryption algorithms