title: CBC-MAC
Deutsche Telekom
Twofish
Serpent (cipher)
RC6
Block cipher
Camellia (cipher)
NewDES
MAGENTA
GOST (block cipher)
sentences: In cryptography, a cipher block chaining message authentication code (CBC-MAC) is a technique for constructing a message authentication code from a block cipher.
 The message is encrypted with some block cipher algorithm in CBC mode to create a chain of blocks such that each block depends on the proper encryption of the previous block.
 This interdependence ensures that a change to any of the plaintext bits will cause the final encrypted block to change in a way that cannot be predicted or counteracted without knowing the key to the block cipher.
Deutsche Telekom AG (   ) (short form in writing only: DT, English: "German Telecom" ) is a German telecommunications company headquartered in Bonn.
 Deutsche Telekom was formed in 1996, as the former state-owned monopoly Deutsche Bundespost was privatized.
In cryptography, Twofish is a symmetric key block cipher with a block size of 128 bits and key sizes up to 256 bits.
 It was one of the five finalists of the Advanced Encryption Standard contest, but it was not selected for standardization.
 Twofish is related to the earlier block cipher Blowfish.
Serpent is a symmetric key block cipher that was a finalist in the Advanced Encryption Standard (AES) contest, where it was ranked second to Rijndael.
 Serpent was designed by Ross Anderson, Eli Biham, and Lars Knudsen.
In cryptography, RC6 (Rivest cipher 6) is a symmetric key block cipher derived from RC5.
 It was designed by Ron Rivest, Matt Robshaw, Ray Sidney, and Yiqun Lisa Yin to meet the requirements of the Advanced Encryption Standard (AES) competition.
 The algorithm was one of the five finalists, and also was submitted to the NESSIE and CRYPTREC projects.
 It was a proprietary algorithm, patented by RSA Security.
In cryptography, a block cipher is a deterministic algorithm operating on fixed-length groups of bits, called a "block", with an unvarying transformation that is specified by a symmetric key.
 Block ciphers operate as important elementary components in the design of many cryptographic protocols, and are widely used to implement encryption of bulk data.
In cryptography, Camellia is a symmetric key block cipher with a block size of 128 bits and key sizes of 128, 192 and 256 bits.
 It was jointly developed by Mitsubishi Electric and NTT of Japan.
 The cipher has been approved for use by the ISO/IEC, the European Union's NESSIE project and the Japanese CRYPTREC project.
 The cipher has security levels and processing abilities comparable to the Advanced Encryption Standard.
In cryptography, NewDES is a symmetric key block cipher.
 It was created in 1984–1985 by Robert Scott as a potential DES replacement.
In cryptography, MAGENTA is a symmetric key block cipher developed by Michael Jacobson Jr. and Klaus Huber for Deutsche Telekom.
 The name MAGENTA is an acronym for Multifunctional Algorithm for General-purpose Encryption and Network Telecommunication Applications.
 (The color magenta is also part of the corporate identity of Deutsche Telekom.)
 The cipher was submitted to the Advanced Encryption Standard process, but did not advance beyond the first round; cryptographic weaknesses were discovered and it was found to be one of the slower ciphers submitted.
The GOST block cipher (Magma), defined in the standard GOST 28147-89 (RFC 5830), is a Soviet and Russian government standard symmetric key block cipher with a block size of 64 bits.
 The original standard, published in 1989, did not give the cipher any name, but the most recent revision of the standard, GOST R 34.12-2015, specifies that it may be referred to as Magma.
 The GOST hash function is based on this cipher.
 The new standard also specifies a new 128-bit block cipher called Kuznyechik.

Question: Question: In cryptography, MAGENTA is a symmetric key block cipher developed fo a a German telecommunications company formed in what year? 

 Your answer will be verified with exact match score. To ensure correct verification, only provide the answer within the <answer> </answer> tags. Do not put any sentences or reasoning process within the <answer> </answer> tags. 

Supporting Information: Paragraph 0 

 In cryptography, a cipher block chaining message authentication code (CBC-MAC) is a technique for constructing a message authentication code from a block cipher.
 The message is encrypted with some block cipher algorithm in CBC mode to create a chain of blocks such that each block depends on the proper encryption of the previous block.
 This interdependence ensures that a change to any of the plaintext bits will cause the final encrypted block to change in a way that cannot be predicted or counteracted without knowing the key to the block cipher. 

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Paragraph 1 

 Deutsche Telekom AG (   ) (short form in writing only: DT, English: "German Telecom" ) is a German telecommunications company headquartered in Bonn.
 Deutsche Telekom was formed in 1996, as the former state-owned monopoly Deutsche Bundespost was privatized. 

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Paragraph 2 

 In cryptography, Twofish is a symmetric key block cipher with a block size of 128 bits and key sizes up to 256 bits.
 It was one of the five finalists of the Advanced Encryption Standard contest, but it was not selected for standardization.
 Twofish is related to the earlier block cipher Blowfish. 

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Paragraph 3 

 Serpent is a symmetric key block cipher that was a finalist in the Advanced Encryption Standard (AES) contest, where it was ranked second to Rijndael.
 Serpent was designed by Ross Anderson, Eli Biham, and Lars Knudsen. 

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Paragraph 4 

 In cryptography, a block cipher is a deterministic algorithm operating on fixed-length groups of bits, called a "block", with an unvarying transformation that is specified by a symmetric key.
 Block ciphers operate as important elementary components in the design of many cryptographic protocols, and are widely used to implement encryption of bulk data. 

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Paragraph 5 

 In cryptography, NewDES is a symmetric key block cipher.
 It was created in 1984–1985 by Robert Scott as a potential DES replacement. 

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Paragraph 6 

 In cryptography, MAGENTA is a symmetric key block cipher developed by Michael Jacobson Jr. and Klaus Huber for Deutsche Telekom.
 The name MAGENTA is an acronym for Multifunctional Algorithm for General-purpose Encryption and Network Telecommunication Applications.
 (The color magenta is also part of the corporate identity of Deutsche Telekom.)
 The cipher was submitted to the Advanced Encryption Standard process, but did not advance beyond the first round; cryptographic weaknesses were discovered and it was found to be one of the slower ciphers submitted. 

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Paragraph 7 

 The GOST block cipher (Magma), defined in the standard GOST 28147-89 (RFC 5830), is a Soviet and Russian government standard symmetric key block cipher with a block size of 64 bits.
 The original standard, published in 1989, did not give the cipher any name, but the most recent revision of the standard, GOST R 34.12-2015, specifies that it may be referred to as Magma.
 The GOST hash function is based on this cipher.
 The new standard also specifies a new 128-bit block cipher called Kuznyechik. 

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Answer: 1996