IDaaS and SaaS: Efficiency of authentication and authorization

IDaaS vs. SaaS for Authentication: A Global Deployment Cost-Benefit Analysis

Identity and Access Management (IAM) is a critical aspect of modern software development, especially for systems designed for global use. Choosing the right authentication and authorization approach directly impacts security, scalability, development speed, and operational costs. In this article, we'll conduct a comparative analysis of five primary IAM implementation strategies, focusing on their applicability and effectiveness in a global network context, and highlight the key advantages of using Identity as a Service (IDaaS) and Software as a Service (SaaS) solutions.

SaaS and IDaaS Fundamentals in Access Management

SaaS (Software as a Service) is a software delivery model where an application is hosted in a cloud infrastructure and accessible to users over the internet. The SaaS provider handles all concerns related to infrastructure, updates, security, scalability, and operations, allowing clients to focus solely on functionality via a web interface or API. This model significantly reduces operational burden and initial capital expenditures.

IDaaS (Identity as a Service) is a specialized variant of SaaS, focused on identity and access management. This cloud-based solution provides secure Single Sign-On (SSO), Multi-Factor Authentication (MFA), and centralized user and access management. Utilizing IDaaS allows organizations to outsource complex and resource-intensive security and compliance tasks, significantly enhancing overall system protection and reducing the workload on internal IT teams.

When considering various approaches to implementing authentication and authorization systems, it's crucial to note that for systems _not confined to a private enterprise network_, SaaS and IDaaS offer the highest efficiency and convenience. Let's delve deeper into each of the five standard scenarios.

1. Open-source Authentication Solutions

Using open-source solutions like Keycloak or Authelia might seem appealing due to the absence of direct licensing fees. However, this approach comes with significant costs for deployment, configuration, and ongoing support. It demands deep team expertise to select the right product, integrate it, ensure its security, and maintain it thereafter.

Key stages and their complexity:

Requirements Analysis: Medium complexity; involves matching needs with open-source capabilities.
Deployment: Medium complexity; includes server setup, containerization (Docker/Kubernetes).
Configuration: Medium to high complexity; requires setting up clients, policies, roles, encryption.
Integration: Medium complexity; via SDKs, APIs, documentation.
Testing: Medium to high complexity; covers security, load, bug identification.
Support: Medium complexity; includes OSS updates, security patches, migrations.
Modification/Customization: High complexity; if unique features are required, sometimes comparable to developing from scratch.

While open-source solutions can be a good choice for closed corporate environments where commercial products aren't justified, they are not "free" in the true sense. The overall complexity and costs associated with their implementation and maintenance remain substantial, though lower than custom development.

2. Custom Authentication System Development from Scratch

Developing a custom authentication and authorization system from scratch is the most labor-intensive, expensive, and risky approach. It demands not only significant time and financial resources but also continuous support, adaptation to new security standards, and vulnerability patching. This path is only justifiable in exceptional cases where unique, critically important requirements cannot be met by off-the-shelf solutions.

Key aspects and their complexity:

Requirements Analysis: High complexity; requires detailed definition of login scenarios, roles, access rights, and compliance with standards.
Architecture Design: High complexity; includes selecting tokens (JWT, OIDC), password storage methods, sessions, and scaling strategies.
Technology Selection: Medium complexity; choosing languages, databases, cryptography.
Module Development: Very high complexity; building registration, login, MFA, OAuth2/OIDC, RBAC, ACL.
Integration: Medium complexity; developing SDKs, APIs, and documentation.
Security: Very high complexity; includes password hashing, protection against CSRF, XSS, brute-force attacks, and auditing.
Logging and Monitoring: Medium complexity; event tracking, alerts.
Testing: High complexity; unit, integration, load, and security testing.
Support and Updates: Consistently high complexity; bug fixes, adaptation to new standards.

The total cost of ownership for such a system is extremely high, and the risks associated with security and compliance fall entirely on the development team. Claims of quickly implementing a custom authentication system should raise serious concerns.

3. Enterprise IAM Solutions

Enterprise solutions (e.g., products from Microsoft, Oracle, IBM) offer high reliability and adherence to stringent standards, making them a choice for large organizations with strict security and compliance requirements. However, they come with very high costs for licensing, deployment, integration, and support. The implementation process for such systems is lengthy and complex, demanding significant resources and staff training.

Implementation stages and complexity:

Requirements Analysis: Medium-high complexity; comprehensive user model, integrations, standard compliance.
License Procurement: Very high cost; includes license fees, server costs, SLAs.
Deployment/Installation: High complexity; server setup, network configuration, integration with LDAP/AD.
Configuration: Medium-high complexity; setting up clients, roles, groups, security policies.
Integration: Medium-high complexity; via SDKs, SSO, SAML/OIDC, APIs.
Staff Training: Medium complexity; for administrators, DevOps, support.
Testing and Auditing: Medium-high complexity; security, compliance, load testing.
Support: Consistently high complexity; SLAs, updates, patches, consulting.

Despite their high reliability, enterprise solutions are characterized by slow adaptation and high total cost of ownership, making them less flexible for rapidly changing business requirements or startups.

4. SaaS Services for Authentication and Authorization (IDaaS)

Leveraging SaaS services for authentication and authorization (IDaaS) is the most efficient and cost-effective approach for most modern applications, especially those targeting a global audience. These services significantly reduce complexity and costs by shifting the primary burden of infrastructure, security, and support to the provider.

Advantages and stage complexity:

Requirements Analysis: Low complexity; simply define core login and permission scenarios.
Registration and Setup: Low complexity; project creation, API key retrieval.
Integration: Medium complexity; utilizing pre-built SDKs/REST APIs.
Testing: Medium complexity (short cycle); verifying integration logic and user roles.
Support: Very low for the client; updates and security are managed by the SaaS provider.

This approach enables rapid implementation of authentication and authorization functionalities, minimizes security risks and regulatory compliance burdens, and significantly reduces operational expenses. IDaaS solutions provide a high level of security, including MFA, and ensure compliance with standards, which is critically important for global products.

5. Low-code/No-code Platforms

Low-code/no-code platforms enable rapid prototyping and the creation of Minimum Viable Products (MVPs) through visual programming and pre-built components. In the context of authentication, this means using embedded modules or integrations with external services. This approach offers high implementation speed but can encounter limitations when complex customization or specific security requirements are needed.

Features and complexity:

Requirements Analysis: Low complexity; simplified model for login and permission scenarios.
Platform Setup: Low-medium complexity; project creation, user connection, authentication templates.
Integration: Medium complexity; utilizing drag-and-drop components, pre-built APIs.
Testing: Medium complexity (short cycle); verifying integration logic and roles.
Support: Low for the client; updates and bug fixes are handled by the platform.
Limitations/Customization: Medium-high complexity for intricate requirements; may necessitate writing additional code.

While low-code solutions are excellent for small businesses and rapid launches, for medium to large projects, they can pose risks due to potential platform limitations in scalability, security, and customization capabilities. Combining low-code with a robust IDaaS service can enhance system stability and functionality.

Comparative Table of Complexity and Costs

For clarity, here's a summary table evaluating the complexity and costs across various criteria for each approach discussed. Ratings are from 0 to 10, where 10 represents maximum complexity/cost.

|---|---|---|---|---|---|

| Requirements Analysis | 8/10 | 6/10 | 7/10 | 3/10 | 3/10 |

| Development / Configuration | 10/10 | 7/10 | 7/10 | 2/10 | 4/10 |

| Frontend / Backend Integration | 6/10 | 5/10 | 6/10 | 4/10 | 4/10 |

| Testing | 8/10 | 6/10 | 6/10 | 4/10 | 4/10 |

| Security / Regulations | 10/10 | 7/10 | 6/10 | 2/10 | 3/10 |

| Support and Updates | 9/10 | 6/10 | 6/10 | 2/10 | 3/10 |

| Customization / Extensibility | 6/10 | 6/10 | 6/10 | 4/10 | 5/10 |

| Implementation Speed | 10/10 | 6/10 | 7/10 | 2/10 | 3/10 |

| Implementation Cost | 10/10 | 6/10 | 9/10 | 3/10 | 4/10 |

| Risks / Management Complexity | 9/10 | 6/10 | 7/10 | 3/10 | 5/10 |

Overall Complexity and Interpretation

The average score across all criteria provides an overall assessment of each approach's complexity and cost-effectiveness:

Custom Development: 8.6 / 10 — The most labor-intensive, expensive, and risky solution, demanding maximum effort and investment.
Open-source: 6.1 / 10 — Medium complexity, significant DevOps costs for deployment, configuration, and support.
Enterprise Solution: 6.7 / 10 — Expensive, time-consuming, and complex to implement, but offers high reliability and standard compliance for large enterprises.
SaaS (IDaaS): 2.9 / 10 — Minimal complexity, optimal in terms of cost and implementation speed, offloading most risks and operational tasks to the provider.
Low-code: 3.8 / 10 — Fast for prototyping and MVPs, but has limitations as projects grow and requirements become more complex.

Key Takeaways

IDaaS/SaaS as the Optimal Choice: For most modern web applications, especially those targeting a global audience, IDaaS (Identity as a Service) and SaaS solutions for authentication and authorization represent the most efficient and cost-effective approach, minimizing costs and risks.
High Cost of Custom Development: Building an authentication system from scratch is an extremely resource-intensive and risky undertaking, demanding deep security expertise and continuous support.
Hidden Costs of Open Source: Open-source solutions, despite lacking direct licensing fees, incur significant operational expenses for deployment, configuration, security, and maintenance.
Enterprise Solutions for Specific Needs: Large corporate IAM systems are justified for organizations with extremely stringent compliance and security requirements, prepared for high capital and operational expenditures.
Implementation Speed vs. Flexibility: Low-code platforms offer rapid implementation of basic functionality but can limit customization and scalability options as a project evolves. This can often be mitigated by integrating with full-featured IDaaS services.

— Editorial Team