By enrolling in BI233, I acknowledge and agree to take three in-person exams in this course. These exams shall be administered at 6:00 PM PST on the Coos Campus on the following dates: Monday, April 13, 2026 (Midterm Exam #1); Monday, May 4, 2026 (Midterm Exam #2); and Monday, June 8, 2026 (Final Exam).

I have reviewed the course schedule for BI232 found on page #3 of the course syllabus and there are no conflicts with my schedule that might prohibit my ability to participate in class activities as assigned. 

Briefly share with me why you’re taking BI233 (nursing, paramedicine, diagnostic imaging, PA/MD/DO school, etc). Further, if you’ve taken another course with me in the past (other than BI231/BI232), remind me what course you took and when. Finally, you may use this space to share anything else you may want me to know about your current academic journey. 

In general, course assignments in BI232 (excluding the syllabus review quiz, as well as excluding midterm exams and the final exam) open at _____ and close at _____ on the assigned days. 

(20 points) A company has software for a symmetric key encryption scheme that is known to be IND-CPA secure under some reasonable assumptions. The message space is the set of bitstrings of arbitrary length. The company wanted to strengthen security and decided to use the existing software in the following way. Let’s call the modified scheme . The encryption algorithm for a message encrypts it twice, i.e., computes the ciphertext as , for any . Here || denotes concatenation. Decryption algorithm  decrypts both parts and makes sure the decryptions are valid and the same message. I.e.,  computes

Generative AI refers to technologies capable of producing original content, such as text, images, music, code, or even videos, by learning patterns from existing data. This includes tools like ChatGPT and similar systems. I confirm that I have read, understand, and agree to the generative AI policy found on page #6 of the course syllabus.

In general, course assignments in BI233 (excluding the syllabus review quiz, as well as excluding the midterm exams and the final exam) open at _____ and close at _____ on the assigned days. 

I have read and understand the late work/missed assignment policy found on page #5 of the course syllabus and acknowledge that no late work is accepted in BI233 (including midterm exams, the final exam, weekly assignments, and extra credit opportunities).

I have reviewed the “Frequently Asked Questions” page found in the introductory module of Canvas, and with any information presented that seems unclear, I will visit my instructor during Week #1 of the course to ensure clarity of such information. Office hours during Week #1 of spring term are Monday, March 30, 2026, from 2:00-4:00pm PST (in-person and by Zoom) and Wednesday, April 1, 2026, from 2:00-3:00pm PST (in-person and by Zoom). 

Josiah owns a beautiful automobile, a 1999 Toyota Corolla. Gina has offered to buy the car from Josiah on multiple occasions for $20,000, but Josiah has always declined the offer. One night, Gina visited the tavern where she knew Josiah usually spent his evenings relaxing, having dinner, and drinking one beer. Upon her arrival, Iris ordered a beer for herself and a milkshake for Josiah. Gina and Josiah proceeded to make jokes and share a few laughs, and again she offered to buy the car from Josiah. This time, Josiah laughed and agreed, writing out and signing a written agreement to sell the car to Iris for $20,000 on several sheets of paper brought to them by an employee of the tavern. Gina observed what Josiah was doing, and she smiled and nodded numerous times as Josiah completed writing out the terms and then handed the sheets of paper to Gina. Then, Gina signed on the signature line for her that Josiah had placed on the form right below where Josiah placed his signature.  The next morning, Gina showed up at Josiah’s house with her check to Josiah for $20,000, but Josiah insisted that the contract was invalid. Is Josiah right? Why or why not?