The war against cybercriminals won\u2019t be won alone. To keep hackers at bay, security vendors are establishing more ways for their customers to cooperate and share data about the latest threats --\u00a0even as it sparks concerns about trust and competition.\u201cWe have to win this war together,\u201d said Ben Johnson, chief security strategist of Carbon Black.The company is the latest to help pool together security expertise with a new platform called the Detection eXchange.Carbon Black protects the networks of thousands of companies, and it's now opening a line of communication between them. More than a virus signature or an IP address, the exchange aims to foster the sharing of "patterns of attack," which identify behaviors and tactics employed by malicious hackers.That can be valuable knowledge, Carbon Black says, because those patterns are harder for hackers to quickly change than something like an IP address.Although CISA has raised concerns about\u00a0privacy, because the government will be the clearing house for data that gets shared, security vendors say collaborating on intelligence can help their clients prevent the next cyberattacks.Palo Alto Networks is another vendor trying to build a culture of cooperation. The industry has been focused on protecting data, but it needs to share it too, said the company\u2019s chief security officer, Rick Howard.In 2014, Palo Alto Networks joined with rivals including Fortinet, Intel Security and Symantec to form the Cyber Threat Alliance. The vendors are each sharing around 1,000 malware samples each day and using that data to bolster their security products.The alliance is still small, with only about eight members, but Howard believes it will be a \u201cgame changer\u201d if the group can expand to 50.Eventually, the alliance aims to have have enough intelligence to keep pace with the latest strategies hackers are using, which will let them move faster in protecting clients.The collaboration clearly has it benefits, but an alliance in which competing vendors share information that's central to their businesses isn't easy to pull off.\u00a0\u201cWhen I first started, I gave it a year," Howard said. "I thought, 'There's no way this is going to hold together.'"But customers like it and regularly encourage the company to expand the cooperation. He's optimistic that it could last.\u00a0\u201cWe had to learn to trust each other, because we don\u2019t like each other,\u201d he jokes.The intelligence sharing fills gaps in what each security vendor knows. For instance, Palo Alto Networks and Symantec overlap in only about 70 percent of the malware intelligence they share, according to Howard.The reluctance to share may also be a challenge for Carbon Black. Companies prefer to keep data private and fear revealing too much, Johnson said, which is why contributors can chose to share on its platform anonymously. But he maintains it's useful at a time when IT security talent is scarce.\u201cSmall companies can understand what big companies are seeing and vice-versa,\u201d Johnson said.\u00a0 \u201cIt\u2019s a tremendous benefit.\u201dJane Wright, an analyst at Technology Business Research, said Carbon Black\u2019s exchange can act as a \u201cwater cooler\u201d where security professionals talk about best practices and incident response. Even so, "sometimes the most valuable sharing just isn\u2019t happening,\u201d she said.A major fear is that information shared about vulnerabilities or a company's infrastructure may be leaked accidentally to other hackers.\u00a0But the pros can outweigh the cons. Companies Wright has talked to see the benefits of wider collaboration and even expect it from their vendor. They realize they\u2019re walking a fine line between the risk of sharing too much and potentially stopping the next cyber attack.