Comparison of DES Triple DES AES blowfish encryption for data

Question

Does anyone have pros and cons together for comparing these encryption algorithms

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Although TripleDESCryptoServiceProvider is a safe and good method but it's too slow. If you want to refer to MSDN you will get that advise you to use AES rather TripleDES. Please check below link: http://msdn.microsoft.com/en-us/library/system.security.cryptography.tripledescryptoserviceprovider.aspx you will see this attention in the remark section:

Note A newer symmetric encryption algorithm, Advanced Encryption Standard (AES), is available. Consider using the AesCryptoServiceProvider class instead of the TripleDESCryptoServiceProvider class. Use TripleDESCryptoServiceProvider only for compatibility with legacy applications and data.

Good luck

User · Answer

AES is a symmetric cryptographic algorithm  while RSA is an asymmetric  or public key  cryptographic algorithm  Encryption and decryption is done with a single key in AES  while you use separate keys  public and private keys  in RSA  The strength of a 128-bit AES key is roughly equivalent to 2600-bits RSA key

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DES is the old  data encryption standard  from the seventies

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Use AES   In more details    DES is the old  data encryption standard  from the seventies  Its key size is too short for proper security  56 effective bits  this can be brute-forced  as has been demonstrated more than ten years ago   Also  DES uses 64-bit blocks  which raises some potential issues when encrypting several gigabytes of data with the same key  a gigabyte is not that big nowadays   3DES is a trick to reuse DES implementations  by cascading three instances of DES  with distinct keys   3DES is believed to be secure up to at least  2112  security  which is quite a lot  and quite far in the realm of  not breakable with today s technology    But it is slow  especially in software  DES was designed for efficient hardware implementation  but it sucks in software  and 3DES sucks three times as much   Blowfish is a block cipher proposed by Bruce Schneier  and deployed in some softwares  Blowfish can use huge keys and is believed secure  except with regards to its block size  which is 64 bits  just like DES and 3DES  Blowfish is efficient in software  at least on some software platforms  it uses key-dependent lookup tables  hence performance depends on how the platform handles memory and caches   AES is the successor of DES as standard symmetric encryption algorithm for US federal organizations  and as standard for pretty much everybody else  too   AES accepts keys of 128  192 or 256 bits  128 bits is already very unbreakable   uses 128-bit blocks  so no issue there   and is efficient in both software and hardware  It was selected through an open competition involving hundreds of cryptographers during several years  Basically  you cannot have better than that    So  when in doubt  use AES   Note that a block cipher is a box which encrypts  blocks   128-bit chunks of data with AES   When encrypting a  message  which may be longer than 128 bits  the message must be split into blocks  and the actual way you do the split is called the mode of operation or  chaining   The naive mode  simple split  is called ECB and has issues  Using a block cipher properly is not easy  and it is more important than selecting between  e g   AES or 3DES

User · Answer

DES                               AES Developed       1977                              2000 Key Length      56 bits                           128  192  or 256 bits Cipher Type     Symmetric                         Symmetric Block Size      64 bits                           128 bits Security        inadequate                        secure Performance     Fast                              Slow

User · Answer

All of these schemes  except AES and Blowfish  have known vulnerabilities and should not be used  However  Blowfish has been replaced by Twofish

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AES is the currently accepted standard algorithm to use  hence the name Advanced Encryption Standard    The rest are not

User · Answer

The encryption methods described are symmetric key block ciphers.

Data Encryption Standard (DES) is the predecessor, encrypting data in 64-bit blocks using a 56 bit key. Each block is encrypted in isolation, which is a security vulnerability.

Triple DES extends the key length of DES by applying three DES operations on each block: an encryption with key 0, a decryption with key 1 and an encryption with key 2. These keys may be related.

DES and 3DES are usually encountered when interfacing with legacy commercial products and services.

AES is considered the successor and modern standard. http://en.wikipedia.org/wiki/Advanced_Encryption_Standard

I believe the use of Blowfish is discouraged.

It is highly recommended that you do not attempt to implement your own cryptography and instead use a high-level implementation such as GPG for data at rest or SSL/TLS for data in transit. Here is an excellent and sobering video on encryption vulnerabilities http://rdist.root.org/2009/08/06/google-tech-talk-on-common-crypto-flaws/

[aes] Comparison of DES, Triple DES, AES, blowfish encryption for data

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