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Questions tagged [compression]

Compression is the reduction in size of data without losing information.

6 questions with no upvoted or accepted answers
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If classical ciphers are used with compressed plaintext, how much does it make frequency analysis attack harder?

Classical ciphers, such as Vigenère cipher, are weak and no longer be used. They can be broken by using frequency analysis, that is a well-known fact. But, the frequency analysis often depends on the ...
2
votes
0answers
111 views

CRIME - attack TLS compression

In the CRIME attack slides at the Ekoparty presentation (where it was first introduced), I didn't get something. In slides 32-35 ( https://www.ekoparty.org/archive/2012/CRIME_ekoparty2012.pdf ) When ...
1
vote
0answers
51 views

Is it necessary to transmit two or three points of an elliptic curve?

Are there cryptographic protocols, where a party should transmit by communication channel simultaneously two or three $\mathbb{F}_q$-points of an elliptic curve over a finite field $\mathbb{F}_q$? ...
1
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0answers
49 views

Is it possible to recover password having ZIP/AES file and unpacked file?

Is it possible to recover password having ZIP/AES file and unpacked file? Or unpack other files with the same password?
0
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0answers
172 views

Symmetric encryption with compression for MySQL DB data

I would like to compress data before encrypting and storing it in a MySQL DB to reduce especially bandwith requirements (compression reduces bandwith by 70-80%). At present, all is handled by a server-...
-1
votes
1answer
71 views

Integrity of Voice packets/ Audio signal

for encryption data packets, one should use GCM, CCM or EAX mode of operation to have confidentiality and integrity. What to do in case of voice packets? is it enough that audio signal gets compressed ...