25c3: Discover Innovative Stream Cipher Designs for Enhanced Data Privacy 🔐
Join Tor E. Bjørstad at 25c3 as he explores cutting-edge stream cipher technologies that transform data into secure line noise, ensuring your digital privacy remains protected even when you have 'nothing to hide.'
Christiaan008
3.1K views • Dec 11, 2010
About this video
Speaker: Tor E. Bjørstad
Turning data into line noise and back
Even with "nothing to hide", we want to protect the privacy of our bits and bytes. Encryption is an important tool for this, and stream ciphers are a major class of symmetric-key encryption schemes. Algorithms such as RC4 (used in WEP/WPA, bittorrent, SSL), A5/1 (GSM telephony), E0 (bluetooth), as well as AES in counter (CTR) mode, are important examples of stream ciphers used in everyday applications.
Whereas a block cipher such as AES works by encrypting fixed-length data blocks (and chaining these together in a suitable mode of operation), stream ciphers output an unique and arbitrary-length keystream of pseudorandom bits or bytes, which is simply XORed with the plaintext stream to produce the ciphertext. Advantages of stream ciphers often include smaller hardware footprint and higher encryption speeds than comparable block ciphers such as AES. However, cryptanalysis has led to attacks on many of the existing algorithms.
The ECRYPT Stream Cipher Project (eSTREAM) has been a 4-year project funded by the EU to evaluate new and promising stream ciphers. The project ended in April 2008, with a final portfolio which currently consists of 7 ciphers: 3 suitable for hardware implementation, and 4 aimed at software environments. The portfolio ciphers are considered to provide an advantage over plain AES in at least one significant aspect, but the designs are very different and often suited for different applications.
Since the eSTREAM ciphers are quite new, many of them are not well known outside the academic community. The goal of this talk is to give a very quick presentation of each of the 7 portfolio ciphers: Grain v1, MICKEY v2, Trivium, HC-128, Rabbit, Salsa20/12 and SOSEMANUK.
More information about the 25th Chaos Communication Congress can be found via the Chaos Communication Congress website: http://bit.ly/25c3_program
Source: http://bit.ly/25c3_videos
Turning data into line noise and back
Even with "nothing to hide", we want to protect the privacy of our bits and bytes. Encryption is an important tool for this, and stream ciphers are a major class of symmetric-key encryption schemes. Algorithms such as RC4 (used in WEP/WPA, bittorrent, SSL), A5/1 (GSM telephony), E0 (bluetooth), as well as AES in counter (CTR) mode, are important examples of stream ciphers used in everyday applications.
Whereas a block cipher such as AES works by encrypting fixed-length data blocks (and chaining these together in a suitable mode of operation), stream ciphers output an unique and arbitrary-length keystream of pseudorandom bits or bytes, which is simply XORed with the plaintext stream to produce the ciphertext. Advantages of stream ciphers often include smaller hardware footprint and higher encryption speeds than comparable block ciphers such as AES. However, cryptanalysis has led to attacks on many of the existing algorithms.
The ECRYPT Stream Cipher Project (eSTREAM) has been a 4-year project funded by the EU to evaluate new and promising stream ciphers. The project ended in April 2008, with a final portfolio which currently consists of 7 ciphers: 3 suitable for hardware implementation, and 4 aimed at software environments. The portfolio ciphers are considered to provide an advantage over plain AES in at least one significant aspect, but the designs are very different and often suited for different applications.
Since the eSTREAM ciphers are quite new, many of them are not well known outside the academic community. The goal of this talk is to give a very quick presentation of each of the 7 portfolio ciphers: Grain v1, MICKEY v2, Trivium, HC-128, Rabbit, Salsa20/12 and SOSEMANUK.
More information about the 25th Chaos Communication Congress can be found via the Chaos Communication Congress website: http://bit.ly/25c3_program
Source: http://bit.ly/25c3_videos
Video Information
Views
3.1K
Likes
11
Duration
46:54
Published
Dec 11, 2010
User Reviews
3.9
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