You are looking at Summer Session A 2026. That term is over, so these are last term's numbers rather than seats you can take. dibs holds 246 sections for Summer Session A 2026, read about 1 month ago. Separately, it has finished 400 of the 3,617 courses on its current checking list for this term. Future-term coverage is incomplete, so a course with nothing here may simply not have been reached yet. Back to Fall 2026

COM SCI M282A / OSTROVSKY, RAFAIL

Cryptography

How COM SCI M282A grades when OSTROVSKY, RAFAIL teaches it. COM SCI M282A, every instructor OSTROVSKY, RAFAIL, every course

Grades, this instructor

3.51adjusted historical GPA, this instructor

112 letter grades across 5 terms, Fall 2021 to Fall 2025. The course pools every instructor at 3.51 over 112 letter grades.

Raw average: 3.51; The mean of this instructor's recorded letter grades in this course.
In the A range: 56.3%; A+, A and A minus out of 112 letter grades.
D, F or W: 0%; D-range and F grades plus withdrawals, divided by letter grades plus withdrawals.
Taken pass/no pass: 0%; No pass/no-pass outcomes are recorded.

Grade distribution

A+11 / 9.8%
A32 / 28.6%
A-20 / 17.9%
B+19 / 17%
B16 / 14.3%
B-13 / 11.6%
C+0 / 0%
C0 / 0%
C-1 / 0.9%
D+0 / 0%
D0 / 0%
D-0 / 0%
F0 / 0%

Percentages are of the 112 letter grades. Grey bars are non-letter outcomes. They are excluded from GPA.

Term by term

Raw averages for the terms in this record. A missing term does not establish that this instructor did not teach it. Summer sessions are included when present.

Dashed line: course average across all instructors, 3.51.

One recorded instructorCo-taught, grades shared

Fall 20213.4533 letter grades.

Fall 20223.5025 letter grades.

Winter 20243.5325 letter grades.

Fall 20243.6016 letter grades.

Fall 20253.5713 letter grades.

Is one term a guide to the next?

Across the measured corpus, the same course and instructor's term averages were strongly correlated, including terms several years apart. That is why the adjustment does not weight recent terms more heavily. This is a dataset-wide pattern, not a promise about this instructor's next class.

Teaching it in Summer Session A 2026

This term has ended. Section counts below are historical readings, not current availability.

No sections are confirmed under this instructor's record in the course listing dibs read for Summer Session A 2026.

Every COM SCI M282A section and instructor

Reading these figures

Raw is the mean of the recorded letter grades. The adjusted historical GPA pulls an instructor's average toward the course's adjusted average, which itself uses a department prior. It is a comparison aid, not a calibrated prediction or a student rating. Small samples carry more uncertainty. All recorded instructor roles are included, and a section is counted only once for this instructor. Grades cannot establish workload or explain why outcomes differed.

What students say

dibs measures outcomes. For students' experiences of the class, BruinWalk has reviews.

Reviews for OSTROVSKY, RAFAIL in COM SCI M282A