# All Questions

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### RSA-OAEP: How does it work?

I was looking at this image about OAEP: ..and was wondering what was happening here. 1) We have a data block DB which consists of: ...
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### Which cryptography technique does not increase the size of the plain data?

I want to encrypt some data(text/voice/video) but it is essential that the size of the cipher data remains the same as the plain data. Which techniques can I use, and how secure are these techniques ...