0
votes
1answer
32 views

Can any ECC field element be safely serialized as “compressed” and then restored as uncompressed?

I have a library that stores all its ECC Field Elements in uncompressed form, in a bloated Base64 XML format, and storage has become a concern. (We want to support QR code as a form factor,etc) ...
2
votes
1answer
67 views

Would it be possible to add additional files to a password protected zip 2.0 file

So the scenario is this: I don't have the ability to determine/recover the master password for a production system that uses zip 2 archives. However, I need to be able to add new files to existing ...
1
vote
1answer
88 views

can you update a one-time pad, over one-time pad encryption (compressed)?

This might well be a silly question, but at the moment I've not thought of a reason it doesn't work. As I think is generally known, you should never re-use a one-time pad. But compression allows you ...
7
votes
4answers
599 views

Is it safe for GPG to compress all messages prior to encryption by default?

By default, GPG compresses text during encryption. Additionally, RFC 4880 says: 2.3. Compression OpenPGP implementations SHOULD compress the message after applying the signature but before ...
1
vote
2answers
215 views

How to defeat CRIME, BREACH, TIME etc… server side (without sacrificing compression)

I am writing full-stack server side software and I have been researching CRIME attacks and it's relation to SPDY header compression as I am implementing the server side codecs for it at the moment. ...
-1
votes
1answer
658 views

Is Opera spying on its users when traffic conpression is enabled?

Correct me if I misunderstand the following quoted paragraphs, but basically to compress something it must be decrypted first. This seems to be the claim of the article but I don't see this as true. ...
4
votes
1answer
899 views

Whats the best custom compression method to use when I have SSL?

Suppose I have an application which does encryption using SSL and provided you cannot control what cipher suite is being negotiated, and assuming that I have some custom compression over the data ...
3
votes
5answers
867 views

Does a binary executable have to have some critical plain-text components?

When companies package binary executables, they are often encrypted, compressed, scrambled, and otherwise made so that your lazy hacker can't simply open the program up in Notepad++ and see the code. ...
15
votes
3answers
6k views

Encryption and compression of Data

If we want both encryption and compression during transmission then what will be the most preferable order. Encrypt then compress Compress then encrypt