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OTA
OTP
Outbound SMS
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OTP
OTPs (One Time Passwords) are dynamic passwords mainly used in the banking and financial industry, but are increasing used in enterprises. OTPs are session-based and time-restricted passwords that make unauthorized access to restricted resources more difficult than with static passwords. By using OTP via SMS to authorize transactions in environments such as online banking, companies ensure a 2-factor authentication and avoid malicious attacks from phishing emails and destructive software such as pharming and Trojans. Therefore the level of security is higher than common "bulk" OTPs provided via email or post, and more cost-effective than token-based OTPs. See also: mTAN.