Smc-networks SMCBR21VPN Manual do Utilizador descarregar pdf (Página 140)

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DES (Data Encryption Standard):

 The Data Encryption Standard developed by IBM in 1977 is a 64-bit block

encryption block cipher using a 56-bit key.

Triple-DES (3DES):

 The DES function performed three times with either two or three

cryptographic keys.

AES (Advanced Encryption Standard):

 An encryption algorithm yet to be decided that will be used to replace the

aging DES encryption algorithm and that the NIST hopes will last for the

next 20 to 30 years.

NULL Algorithm:

 It is a fast and convenient connecting mode to make sure its privacy and

authentication without encryption. NULL Algorithm doesn’t provide any other

safety services but a way to substitute ESP Encryption

SHA-1 (Secure Hash Algorithm-1):

 A message-digest hash algorithm that takes a message less than 264 bits

and produces a 160-bit digest.

MD5:

 MD5 is a common message digests algorithm that produces a 128-bit

message digest from an arbitrary length input, developed by Ron Rivest.

GRE/IPSec:

 The device Select GRE/IPSec (Generic Routing Encapsulation) packet seal

technology.

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Smc-networks SMCBR21VPN Manual do Utilizador Página 140