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Legal claims on encryption and authentication algorithm




Hello,
     While reading RFC 1321, I noted that if we use MD5, we must state that
it was developped by RSA Data Security, Inc.
     We use other encryption and authentication algorithms. Is there any
legal claims (copyrights, patents, etc.) tied to the following algorithms?
- Blowfish
- DES
- 3DES
- SHA-1
     Thank you




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