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Optimal Asymmetric Encryption Padding is a padding scheme for RSA, codifying how short plaintext is enciphered and deciphered. It has a security reduction to the RSA problem.

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What is the reason for length differences in RSA?

On the contrary, in NIST SP800-56B, page 63, RSA-OAEP encryption, the minimal length is 2048. Why 1024 is secure enough for digital signature but not for encryption? …
Evgeni Vaknin's user avatar