Security is not usually the first thing businesses ask about when evaluating RCS messaging- rich cards and click-through rates tend to get the attention first. But for any business sending customer communications at scale, especially alongside bulk SMS, understanding how secure the channel actually is matters just as much as how well it converts.
The short version is that RCS was designed with meaningfully stronger security foundations than SMS, particularly around sender identity. That single difference- verified sender identity versus SMS's unverified sender IDs- is arguably RCS's most underrated advantage, and it directly addresses one of the most persistent fraud problems in Indian mobile messaging: SMS-based phishing, commonly called smishing.
Quick answer: RCS is more secure than SMS for business messaging primarily because every RCS Business Messaging sender must pass Google's brand verification before displaying a verified name, logo, and badge, making sender impersonation far harder than with SMS's unverified alphanumeric sender IDs. Person-to-person RCS chats are end-to-end encrypted, while business RCS messaging is encrypted in transit and handled under standard data protection practices, similar to other business messaging channels.
Why SMS Security Has Been a Long-Standing Problem in India
To understand why RCS's security model matters, it helps to understand what it is replacing. SMS uses a 6-character alphanumeric sender ID- something like "SBIBNK" or "AMAZON"- that any registered business can request through the TRAI DLT framework. There is no cryptographic verification tied to that sender ID, and no visual indicator on the customer's phone that distinguishes a legitimate sender from a bad actor who registered a similarly named ID.
This gap is a major reason SMS phishing, or "smishing," remains widespread in India- messages claiming to be from banks, delivery services, or government departments, using sender IDs designed to look convincingly official, that trick customers into clicking malicious links or sharing sensitive information. Our RCS vs SMS comparison covers this gap from a broader feature perspective; this guide focuses specifically on the security implications.
Verified Sender Identity: RCS's Core Security Advantage
Every RCS Business Messaging sender must complete Google's brand verification process before they can send messages with their verified name, logo, and checkmark badge. This is the single biggest structural security improvement RCS offers over SMS, and it directly targets the sender-spoofing problem described above.
How Google's Business Verification Works
- The business submits its legal registration details (Certificate of Incorporation, GST certificate, or equivalent), confirming it is a real, registered entity
- The business provides its official name, logo, and brand colours, matching what customers will actually see
- The business describes its intended use case- marketing, transactional, or conversational messaging
- Google reviews the submission against its business messaging policies
- Once approved, the business is issued verified sender status, and its messages display the verified badge to every recipient
This process typically takes 5 to 7 business days. Our full RCS verified sender guide walks through the documentation requirements in more detail. Get Click Media manages this verification on behalf of clients as part of onboarding, so businesses do not need to navigate Google's requirements directly.
Why This Matters for Customers
When a customer receives a verified RCS message, they see the business's actual name and logo, not a generic alphanumeric code they have to trust blindly. A scammer without a verified business account cannot easily replicate this badge, which makes convincing impersonation substantially harder on RCS than on SMS. Over time, as customers become accustomed to checking for the verified badge, this creates a meaningful trust barrier that SMS never had.
Encryption: P2P vs Business Messaging
RCS encryption works differently depending on the type of conversation, and this distinction is worth understanding clearly rather than assuming RCS is uniformly "encrypted" in every context.
| Conversation type | Encryption |
|---|---|
| Person-to-person (P2P) RCS chat in Google Messages | End-to-end encrypted |
| RCS Business Messaging (business to consumer) | Encrypted in transit; not end-to-end in the P2P sense |
| Standard SMS | Not encrypted |
Person-to-person RCS chats between individuals using Google Messages are end-to-end encrypted, meaning only the sender and recipient can read the message content- not even Google can access it in transit.
RCS Business Messaging, the type businesses use for marketing and transactional campaigns, is encrypted in transit between the business's messaging platform, the carrier or aggregator network, and the recipient's device. It is not end-to-end encrypted in the same sense as P2P chats, because the business, and its messaging platform, needs visibility into message content and delivery status to operate the campaign, track delivery, and provide analytics. This is standard practice across business messaging channels generally, including WhatsApp Business API at scale, and is not unique to RCS or a weakness specific to it.
In either case, RCS Business Messaging is still a substantial security improvement over standard SMS, which carries no encryption at all and is far more vulnerable to interception on certain network configurations.
RCS vs SMS: A Direct Security Comparison
| Security factor | RCS Business Messaging | SMS |
|---|---|---|
| Sender verification | Required (Google brand verification) | None- any DLT-registered sender ID |
| Visual trust signal | Verified badge, logo, brand name | None- text-only sender ID |
| Encryption in transit | Yes | No |
| Ease of sender spoofing | Difficult- verification required | Relatively easy- no verification |
| Prevalence of impersonation fraud | Low, and structurally harder | Historically high (smishing) |
| Read receipts / interaction tracking | Yes | No |
| Regulatory classification in India | Generally not commercial SMS under TRAI | Regulated under TRAI DLT and DND |
How RCS Handles Business and Customer Data
RCS Business Messaging can capture richer interaction signals than SMS, including delivery confirmation, read receipts, and which specific button a customer tapped within a rich card. This data exists to support delivery confirmation and campaign performance measurement, the same fundamental purpose as SMS delivery reports, just with more granularity because the format supports it.
Businesses evaluating an RCS provider should apply the same due diligence they would to any customer data platform: understand how message content and interaction data are stored, how long they are retained, who has access, and whether the provider follows standard data protection practices. A reputable RCS API integration should give your team clear visibility into how data flows between your systems, the messaging platform, and the carrier network.
Practical Security Guidance for Businesses Sending RCS
Complete verification before launch
Do not attempt to send RCS Business Messaging without completing Google's brand verification. Beyond being a functional requirement, verification is the mechanism that gives your customers a way to trust that a message genuinely came from you.
Choose a provider with direct carrier integration
Working with a provider that has direct integrations with carriers like Jio, Airtel, and Vi, rather than routing through unclear intermediary layers, reduces the number of parties handling your message data and generally means faster, more transparent delivery reporting.
Keep branding consistent across every campaign
Consistent use of your verified name, logo, and colours reinforces the trust signal for customers over time. Sudden changes in branding, or inconsistent presentation across campaigns, can undermine the recognition benefit that verification is meant to provide.
Honour opt-outs immediately
A prompt, reliably enforced opt-out process is both good practice and a factor in maintaining your sender reputation. Repeated complaints against a verified sender can affect deliverability for an entire messaging program, not just the specific customers who complained.
Understand the current compliance landscape
RCS Business Messaging in India is generally not currently classified as commercial SMS under TRAI's DND and DLT regulations, which is a meaningful operational advantage, but businesses should still apply sound consent and data-handling practices. This is general guidance rather than legal advice- review current requirements for your specific use case, and see our TRAI SMS compliance guide for how this plays out on the SMS side of a combined messaging program.
Avoid the common execution mistakes that undermine trust
Security and execution quality are connected- a poorly designed campaign, an unverified sender, or a confusing message can erode customer trust just as much as a technical vulnerability. Our guide to common RCS mistakes and our RCS best practices playbook both cover execution details that indirectly support a trustworthy customer experience.
Is RCS Ready to Replace SMS for Sensitive Communications?
Not entirely, at least not yet. SMS still has near-universal device reach in India, including feature phones and low-connectivity areas, which is why it remains the default channel for OTPs and other time-critical, universal-reach communications for many businesses today. RCS's verified sender model is a genuine trust improvement, but its device coverage- currently strongest on Android with Google Messages and iOS 18 and above- means many businesses run RCS and SMS together rather than switching entirely.
The practical approach most Indian businesses take is to use RCS's verified identity and rich format for marketing, order updates, and conversational engagement, while continuing to rely on SMS as a fallback and for use cases where universal device reach matters most. Get Click Media's platform supports both channels from a single dashboard, automatically routing each message based on device capability.
Get Click Media is one of India's leading RCS messaging service providers, with direct carrier integrations with Jio, Airtel, and Vi. Our onboarding process manages Google brand verification end-to-end, and our platform combines verified RCS Business Messaging with automatic SMS fallback from a single, secure dashboard. Request a demo to see how verified sender identity works in practice.
Frequently Asked Questions
Yes, RCS is significantly more secure than SMS for business messaging. Every RCS Business Messaging sender must pass Google's brand verification process before they can display a verified name, logo, and checkmark badge, which makes sender impersonation far harder than with SMS's unverified alphanumeric sender IDs. Person-to-person RCS chats in Google Messages also use end-to-end encryption, though encryption for business-to-consumer RCS messaging works differently, as covered below.
Person-to-person (P2P) RCS conversations between individuals using Google Messages are end-to-end encrypted. RCS Business Messaging, where a business sends messages to consumers, is encrypted in transit between the business, the carrier or aggregator, and the recipient's device, but it is not end-to-end encrypted in the same sense as P2P chats, because the business and its messaging platform need to process message content and delivery data. This is standard for business messaging channels generally, including WhatsApp Business API at scale.
RCS prevents phishing far more effectively than SMS because every RCS Business Messaging sender is verified by Google before they can use a verified badge, brand name, and logo, making it much harder for a scammer to convincingly impersonate a real business. SMS, by contrast, uses unverified 6-character alphanumeric sender IDs that anyone can register, including names that closely resemble legitimate brands, which is a major reason SMS phishing (smishing) remains widespread in India.
Google's RCS business verification requires a business to submit its legal registration details, business name, logo, brand colours, and a description of its intended use case before it can send RCS Business Messaging. Google reviews this submission to confirm the business is legitimate and matches what will be displayed to customers, and only approved businesses receive the verified sender badge. The process typically takes 5 to 7 business days.
It is far more difficult for a scammer to impersonate a business on RCS than on SMS, because RCS Business Messaging requires Google's brand verification before a sender can display a verified name, logo, and badge. A scammer without a verified business account cannot easily replicate this, whereas SMS sender IDs have no equivalent verification step, which is why sender spoofing remains a common tactic in SMS-based fraud.
RCS Business Messaging can capture richer interaction data than SMS, including read receipts and which specific buttons a customer tapped, because the format supports this natively. This data is used for delivery confirmation and campaign analytics, similar in principle to how any modern messaging or app analytics platform works, and reputable providers handle it under standard data protection and privacy practices. Businesses should review their messaging provider's data handling practices as part of any vendor evaluation.
RCS's verified sender identity makes it a more trustworthy channel for sensitive communications in principle, since customers can visually confirm the message is coming from a verified business rather than an anonymous sender ID. That said, SMS remains widely used for OTPs today because of its universal device reach, and many businesses currently use SMS as the primary OTP channel with RCS reserved for richer, verified interactions, adjusting this mix as RCS device coverage grows.
Businesses sending RCS should complete Google's brand verification, use a reputable RCS provider that supports secure API or platform access, apply the same data-handling discipline they would to any customer communication channel, and honour opt-outs promptly. Beyond verification, most of the security benefit of RCS comes built into the channel itself- the main responsibility for businesses is choosing a compliant provider and following standard good-practice data handling.
