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PKCS #1: RSA Cryptography Standard

This document provides recommendations for the implementation of public-key cryptography based on the RSA algorithm, covering the following aspects: cryptographic primitives; encryption schemes; signature schemes with appendix; ASN.1 syntax for representing keys and for identifying the schemes.

Version 2.2

Version 2.1

  • PKCS #1: RSA Cryptography Standard: MS-Word, Acrobat PDF.
  • ASN Module for PKCS #1 v2.1
  • Errata for PKCS #1 v2.1 (txt)
  • NOTE: A new OID has been defined for the combination of the v1.5 signature scheme and the SHA-224 hash function:

    sha224WithRSAEncryption OBJECT IDENTIFIER ::=

    Like the other sha*WithRSAEncryption OIDs in PKCS #1 v2.1, this OID has NULL parameters.

    The DigestInfo encoding for SHA-224 (see Section 9.2, Note 1) is:

    (0x)30 2d 30 0d 06 09 60 86 48 01 65 03 04 02 04 05 00 04 1c || H

Version 2.0

Version 1.5

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