Comments on: Two OCB Block Cipher Mode Patents Expired Due To Nonpayment https://pthree.org/2016/03/31/two-ocb-block-cipher-mode-patents-expired-due-to-nonpayment/ Linux. GNU. Freedom. Thu, 15 Feb 2018 18:04:15 +0000 hourly 1 https://wordpress.org/?v=5.0-alpha-42199 By: Phillip Rogaway https://pthree.org/2016/03/31/two-ocb-block-cipher-mode-patents-expired-due-to-nonpayment/#comment-262706 Wed, 20 Apr 2016 16:25:42 +0000 https://pthree.org/?p=4615#comment-262706 I let the first two patents on OCB lapse, as two that issued later had better claims. The USPTO changes high fees just to keep these things alive, and I didn't want to pay.

If you're wanting to use OCB but the patents I did are an obstacle, despite all the free licenses I put out, please email me. My IP is already freely licensed for open-source software.

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By: Ricardo Branco https://pthree.org/2016/03/31/two-ocb-block-cipher-mode-patents-expired-due-to-nonpayment/#comment-262444 Mon, 04 Apr 2016 19:07:23 +0000 https://pthree.org/?p=4615#comment-262444 OpenSSL is already supporting OCB, and will be official in the next version. Check their Git repo at:
https://github.com/openssl/openssl

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By: Rene https://pthree.org/2016/03/31/two-ocb-block-cipher-mode-patents-expired-due-to-nonpayment/#comment-262427 Sat, 02 Apr 2016 01:53:17 +0000 https://pthree.org/?p=4615#comment-262427 It seems the patents can still be reinstated by payment arrangements:

http://www.uspto.gov/patents-maintaining-patent/maintain-your-patent

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