WEBVTT 1 00:00:00.000 --> 00:00:01.320 In this lesson, 2 00:00:01.320 --> 00:00:05.070 we will learn about Application Programming Interface 3 00:00:05.070 --> 00:00:07.290 or API security. 4 00:00:07.290 --> 00:00:12.290 API security protects APIs from unauthorized access, 5 00:00:12.360 --> 00:00:16.980 misuse, and attacks to ensure secure interactions 6 00:00:16.980 --> 00:00:20.760 between applications and cloud services. 7 00:00:20.760 --> 00:00:25.020 API security concepts include authorization, 8 00:00:25.020 --> 00:00:27.480 rate limiting, and logging. 9 00:00:27.480 --> 00:00:31.740 Authorization ensures that only authenticated users 10 00:00:31.740 --> 00:00:34.620 and applications are granted access 11 00:00:34.620 --> 00:00:37.680 to specific API endpoints. 12 00:00:37.680 --> 00:00:42.680 Next, rate limiting controls the number of API requests 13 00:00:42.780 --> 00:00:47.400 a user or application can make within a given time. 14 00:00:47.400 --> 00:00:52.020 Last, logging involves recording API interactions 15 00:00:52.020 --> 00:00:57.020 to monitor usage, detect anomalies, and troubleshoot issues. 16 00:00:57.150 --> 00:01:00.060 Let's learn more about authorization, 17 00:01:00.060 --> 00:01:02.730 rate limiting, and logging. 18 00:01:02.730 --> 00:01:05.790 First, we have authorization. 19 00:01:05.790 --> 00:01:08.400 Authorization is an important part 20 00:01:08.400 --> 00:01:13.020 of API programming interface or API security 21 00:01:13.020 --> 00:01:17.400 that ensures only authenticated users and applications 22 00:01:17.400 --> 00:01:21.510 have access to specific API endpoints. 23 00:01:21.510 --> 00:01:26.400 Once a user is authenticated, the API must determine 24 00:01:26.400 --> 00:01:29.940 what actions the user is allowed to perform. 25 00:01:29.940 --> 00:01:33.360 For instance, in a healthcare application, 26 00:01:33.360 --> 00:01:37.980 a doctor might have authorization to access patient records 27 00:01:37.980 --> 00:01:40.170 and write prescriptions, 28 00:01:40.170 --> 00:01:43.050 while a patient might only be authorized 29 00:01:43.050 --> 00:01:45.660 to view their own medical data. 30 00:01:45.660 --> 00:01:48.000 This distinction is important 31 00:01:48.000 --> 00:01:51.330 because without proper authorization controls, 32 00:01:51.330 --> 00:01:54.000 sensitive information could be exposed 33 00:01:54.000 --> 00:01:57.510 or modified by unauthorized users, 34 00:01:57.510 --> 00:02:01.590 leading to privacy violations or data breaches. 35 00:02:01.590 --> 00:02:04.530 Next, in API security, 36 00:02:04.530 --> 00:02:07.440 authorization is typically implemented 37 00:02:07.440 --> 00:02:11.280 through token-based systems such as OAuth 38 00:02:11.280 --> 00:02:15.390 or JavaScript object notation web tokens, 39 00:02:15.390 --> 00:02:19.860 abbreviated JWT, but pronounced jot. 40 00:02:19.860 --> 00:02:23.700 So when a user logs in, they receive a token 41 00:02:23.700 --> 00:02:27.210 that encodes their identity and permissions. 42 00:02:27.210 --> 00:02:32.040 Every subsequent API request includes this token, 43 00:02:32.040 --> 00:02:35.700 allowing the system to check if the user is authorized 44 00:02:35.700 --> 00:02:38.700 to access the requested resource. 45 00:02:38.700 --> 00:02:43.700 For example, if a user attempts to access an API endpoint 46 00:02:44.310 --> 00:02:46.770 that retrieves financial records, 47 00:02:46.770 --> 00:02:49.170 the system will inspect the token 48 00:02:49.170 --> 00:02:53.100 to confirm whether the user has the right permissions. 49 00:02:53.100 --> 00:02:56.670 If the token lacks the necessary authorization, 50 00:02:56.670 --> 00:02:58.680 the request is denied, 51 00:02:58.680 --> 00:03:03.270 protecting sensitive data from unauthorized access. 52 00:03:03.270 --> 00:03:07.890 Finally, a robust authorization system should be in place 53 00:03:07.890 --> 00:03:11.250 to enforce role-based access control 54 00:03:11.250 --> 00:03:14.280 or attribute-based access control, 55 00:03:14.280 --> 00:03:16.500 allowing fine-grain control 56 00:03:16.500 --> 00:03:19.860 over what users can and cannot do. 57 00:03:19.860 --> 00:03:23.040 For example, in a business environment, 58 00:03:23.040 --> 00:03:27.180 role-based access control could be used to ensure 59 00:03:27.180 --> 00:03:31.140 that only managers can approve expense reports, 60 00:03:31.140 --> 00:03:34.920 while regular employees can only submit them. 61 00:03:34.920 --> 00:03:38.790 In this way, properly implementing authorization 62 00:03:38.790 --> 00:03:41.820 helps prevent unauthorized actions, 63 00:03:41.820 --> 00:03:45.720 ensuring that users can only perform operations 64 00:03:45.720 --> 00:03:47.520 they are permitted to, 65 00:03:47.520 --> 00:03:51.930 strengthening the overall security of the API. 66 00:03:51.930 --> 00:03:54.870 Second, we have rate limiting. 67 00:03:54.870 --> 00:03:59.870 Rate limiting is another important component of API security 68 00:04:00.060 --> 00:04:03.360 that controls the number of requests a user 69 00:04:03.360 --> 00:04:06.960 or application can make to an API 70 00:04:06.960 --> 00:04:09.720 within a specific timeframe. 71 00:04:09.720 --> 00:04:14.040 This is particularly useful in preventing abuse 72 00:04:14.040 --> 00:04:17.940 or overuse of API resources, 73 00:04:17.940 --> 00:04:22.320 such as protecting against denial of service attacks. 74 00:04:22.320 --> 00:04:25.740 For example, a public-facing API 75 00:04:25.740 --> 00:04:28.290 for an online ticketing service 76 00:04:28.290 --> 00:04:33.290 may impose a rate limit of 100 requests per minute per user. 77 00:04:34.560 --> 00:04:37.980 This ensures that no individual user 78 00:04:37.980 --> 00:04:41.790 can overwhelm the system with too many requests, 79 00:04:41.790 --> 00:04:44.760 which could degrade performance for others 80 00:04:44.760 --> 00:04:47.400 or even crash the service. 81 00:04:47.400 --> 00:04:50.310 A common implementation of rate limiting 82 00:04:50.310 --> 00:04:54.180 involves assigning each user or application 83 00:04:54.180 --> 00:04:57.900 a limit on the number of API calls they can make 84 00:04:57.900 --> 00:05:00.240 within a defined time window, 85 00:05:00.240 --> 00:05:03.390 such as per minute or per hour. 86 00:05:03.390 --> 00:05:08.310 For example, an e-commerce API might allow a customer 87 00:05:08.310 --> 00:05:11.430 to make 500 requests per hour. 88 00:05:11.430 --> 00:05:14.070 If the customer exceeds this limit, 89 00:05:14.070 --> 00:05:17.550 the API will start rejecting their requests 90 00:05:17.550 --> 00:05:19.530 with a message indicating 91 00:05:19.530 --> 00:05:21.840 that they have hit their rate limit. 92 00:05:21.840 --> 00:05:25.680 This not only protects the system from potential abuse, 93 00:05:25.680 --> 00:05:30.270 but also helps ensure fair usage among all users. 94 00:05:30.270 --> 00:05:32.130 Rate limits can vary 95 00:05:32.130 --> 00:05:36.150 depending on the user's role or subscription level, 96 00:05:36.150 --> 00:05:39.600 providing flexibility in managing traffic. 97 00:05:39.600 --> 00:05:42.990 Rate limiting also plays a role in mitigating 98 00:05:42.990 --> 00:05:45.150 more sophisticated attacks 99 00:05:45.150 --> 00:05:48.030 like distributed denial of service attacks, 100 00:05:48.030 --> 00:05:51.690 where a large number of malicious requests are sent 101 00:05:51.690 --> 00:05:54.090 to overwhelm the system. 102 00:05:54.090 --> 00:05:58.710 By imposing strict rate limits on individual IP addresses 103 00:05:58.710 --> 00:06:03.450 or API keys, an API can effectively slow down 104 00:06:03.450 --> 00:06:08.280 or block excessive traffic, preventing system overload. 105 00:06:08.280 --> 00:06:12.360 For example, if a hacker attempts to flood an API 106 00:06:12.360 --> 00:06:16.620 with thousands of requests in a short period of time, 107 00:06:16.620 --> 00:06:19.890 rate limiting would ensure that only a small portion 108 00:06:19.890 --> 00:06:22.200 of those requests are processed, 109 00:06:22.200 --> 00:06:25.920 protecting the API from being taken offline. 110 00:06:25.920 --> 00:06:28.980 Third and last, we have logging. 111 00:06:28.980 --> 00:06:33.630 Logging is a fundamental practice in API security, 112 00:06:33.630 --> 00:06:38.070 enabling the recording of every API interaction 113 00:06:38.070 --> 00:06:41.130 to provide a detailed audit trail. 114 00:06:41.130 --> 00:06:45.000 This is important for monitoring usage patterns, 115 00:06:45.000 --> 00:06:49.380 detecting security threats, and troubleshooting issues. 116 00:06:49.380 --> 00:06:53.460 For example, in a cloud storage API, 117 00:06:53.460 --> 00:06:58.460 every time a user uploads, downloads, or deletes a file, 118 00:06:59.040 --> 00:07:02.100 a log entry is created with details 119 00:07:02.100 --> 00:07:06.990 such as the user's identity, the action performed, 120 00:07:06.990 --> 00:07:10.740 the time it occurred, and the result. 121 00:07:10.740 --> 00:07:15.720 These logs can be used to verify legitimate actions 122 00:07:15.720 --> 00:07:19.140 or to investigate suspicious behavior, 123 00:07:19.140 --> 00:07:21.870 such as unauthorized users 124 00:07:21.870 --> 00:07:25.770 attempting to delete files they do not own. 125 00:07:25.770 --> 00:07:29.010 In addition to helping detect anomalies, 126 00:07:29.010 --> 00:07:31.410 logging is valuable for compliance 127 00:07:31.410 --> 00:07:34.110 and regulatory requirements too. 128 00:07:34.110 --> 00:07:37.860 Many industries such as finance and healthcare 129 00:07:37.860 --> 00:07:41.640 require detailed records of all interactions 130 00:07:41.640 --> 00:07:43.470 with sensitive data. 131 00:07:43.470 --> 00:07:47.940 By keeping a comprehensive log of API activities, 132 00:07:47.940 --> 00:07:50.250 an organization can ensure 133 00:07:50.250 --> 00:07:53.220 that it meets these compliance standards. 134 00:07:53.220 --> 00:07:56.700 For example, in a healthcare API, 135 00:07:56.700 --> 00:08:00.750 logs of every time a patient's record is accessed 136 00:08:00.750 --> 00:08:04.380 provide evidence that only authorized personnel 137 00:08:04.380 --> 00:08:06.720 are in interacting with the data, 138 00:08:06.720 --> 00:08:09.390 enabling compliance with regulations 139 00:08:09.390 --> 00:08:11.850 like the Health Insurance Portability 140 00:08:11.850 --> 00:08:14.760 and Accountability Act, or HIPAA. 141 00:08:14.760 --> 00:08:18.450 Moreover, logging provides a powerful tool 142 00:08:18.450 --> 00:08:22.260 for troubleshooting issues within an API. 143 00:08:22.260 --> 00:08:24.930 If a particular API endpoint 144 00:08:24.930 --> 00:08:27.870 is experiencing performance problems 145 00:08:27.870 --> 00:08:30.720 or returning unexpected errors, 146 00:08:30.720 --> 00:08:34.410 logs can help pinpoint the source of the issue. 147 00:08:34.410 --> 00:08:38.130 For example, if a payment processing API 148 00:08:38.130 --> 00:08:40.710 is failing intermittently, 149 00:08:40.710 --> 00:08:44.580 the logs might reveal that the failures are tied 150 00:08:44.580 --> 00:08:47.670 to a specific sequence of requests, 151 00:08:47.670 --> 00:08:50.730 helping developers quickly identify 152 00:08:50.730 --> 00:08:52.890 and resolve the problem. 153 00:08:52.890 --> 00:08:57.890 Additionally, logs can be in security incident response 154 00:08:57.990 --> 00:09:01.440 to reconstruct the timeline of an attack, 155 00:09:01.440 --> 00:09:03.630 allowing security teams 156 00:09:03.630 --> 00:09:06.450 to take appropriate corrective action 157 00:09:06.450 --> 00:09:09.090 and prevent future breaches. 158 00:09:09.090 --> 00:09:14.090 So remember, API security protects APIs 159 00:09:14.760 --> 00:09:19.350 from unauthorized access, misuse, and attacks, 160 00:09:19.350 --> 00:09:21.900 ensuring secure interactions 161 00:09:21.900 --> 00:09:25.710 between applications and cloud services. 162 00:09:25.710 --> 00:09:28.470 Key elements of API security 163 00:09:28.470 --> 00:09:33.120 include authorization, rate limiting, and logging. 164 00:09:33.120 --> 00:09:37.170 Authorization ensures that only authenticated users 165 00:09:37.170 --> 00:09:42.170 or applications can access specific API endpoints 166 00:09:42.270 --> 00:09:45.000 and perform allowed actions. 167 00:09:45.000 --> 00:09:48.930 Next, rate limiting controls the number of requests 168 00:09:48.930 --> 00:09:53.930 a user or application can make within a set timeframe, 169 00:09:54.150 --> 00:09:57.600 preventing overuse and protecting against attacks 170 00:09:57.600 --> 00:09:59.610 like denial of service. 171 00:09:59.610 --> 00:10:03.990 Finally, logging records all API interactions, 172 00:10:03.990 --> 00:10:07.650 creating an audit trail that helps monitor usage, 173 00:10:07.650 --> 00:10:11.100 detect anomalies, and troubleshoot security 174 00:10:11.100 --> 00:10:13.053 or performance issues.