Underscoring the insecurity of many online dating, job, and e-mail services, security researchers said that they have tracked almost 360 million compromised login credentials for sale in underground crime forums over the past three weeks.
The haul, which included an additional 1.25 billion records containing only e-mail addresses, came from multiple breaches, according to a statement posted Tuesday by Hold Security.

The biggest single list contained 105 million details, making it among the bigger online finds, the firm told Reuters.

The cache included e-mail addresses that most likely served as user names and corresponding passwords. It remains unclear what service the account credentials unlock.
Hold Security is the same firm that in October discovered the circulation of 153 million user names and passwords stolen during a massive breach of Adobe’s corporate network.

A month later, the security firm uncovered 42 million plaintext passwords taken during a hack on niche dating service Cupid Media.

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