EC ENGR M117 · Lec 1
Computer System Security
Fall 2026 · Tian, Y. · 4 units
Also listed as COM SCI M138 (closed by the department, limited): the same class, and each department holds its own seats and its own grade history.
Watching is the one thing here that needs an account, because an alert needs somewhere to go. Everything else on this page works signed out.
Open on the registrar (opens in a new tab)- Status
- Closed
Tell dibs what you have already taken and this line will say which of these you have. Your list.
- Restrictions read 46 hours ago. Dibs re-reads these slowly because they rarely change; watch the section and it moves to every 6 hours.
- Enrolled in lecture
- 140 of 140
- 100% full
- Read 23 hours ago. The registrar publishes once an hour, so the seats and the instructors here may both have moved since.
- Waitlist
- No waitlist
- Seat risk
- high risk
From the registrar
Students who enroll in upper-division courses offered by the Samueli School without completing the requisites are subject to disenrollment after the second class meeting. If necessary, consult with an OASA counselor through MyUCLA Message Center.
Discussions: this is what you enroll in
Enrollment at UCLA acts on the discussion, not the lecture. The lecture's seat count above is the sum across all of them, so it can read open while every discussion you could actually join is full.
| Discussion | Status | Enrolled | Seats left | Meets | Where |
|---|---|---|---|---|---|
|
Lab 1A
|
Closed | 35 of 35 | 0 | F 12:00pm-12:50pm | Boelter Hall 5419 |
|
Lab 1B
|
Closed | 35 of 35 | 0 | F 1:00pm-1:50pm | Boelter Hall 5419 |
|
Lab 1C
|
Closed | 35 of 35 | 0 | F 2:00pm-2:50pm | Boelter Hall 5420 |
|
Lab 1D
|
Closed | 35 of 35 | 0 | F 3:00pm-3:50pm | Boelter Hall 5420 |
When it meets
Meets: MW 4:00pm-5:50pm
Boelter Hall 3400
Predicted GPA
- A range
- 99%
- P/NP
- -
- letter grade only
- D/F/W
- 0.0%
What students say
Dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.
Enrollment over time
A dot is a reading where something moved: the seat count, the status, or the waitlist. The last one is the most recent sweep, moved or not. The line holds flat between dots because that is what the readings say: it did not drift, it held and then jumped. The ticks along the bottom are the hours Dibs recorded reading this section, which is how a flat run says "checked, unchanged" rather than "nobody looked". It only keeps those from 25 August, so the ruler is shorter than the line for now. Both start when Dibs did rather than reaching back before it existed.
Unchanged over 10 days
Show the readings
| Recorded | Enrolled | Capacity | Status | Waitlist |
|---|---|---|---|---|
| 28 Aug 12:43 | 140 | 140 | closed | - |
| 18 Aug 20:40 | 140 | 140 | closed | - |
How big this course usually runs
Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.
- 14124F
Peak 141 · most recent 24F at 141